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Patent License Agreement - Massachusetts Institute of Technology and Cheung Laboratories Inc.

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                      MASSACHUSETTS INSTITUTE OF TECHNOLOGY

                                       and

                            CHEUNG LABORATORIES, INC.

                            PATENT LICENSE AGREEMENT


                 M.I.T.'S OFFER TO CHEUNG LABORATORIES, INC. TO
              ENTER INTO THIS LICENSE AGREEMENT SHALL EXTEND UNTIL
                           NO LATER THAN JUNE 1, 1996.


                                   (EXCLUSIVE)










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                                TABLE OF CONTENTS

WITNESSETH...............................................................  1
1.  DEFINITIONS..........................................................  2
2.  GRANT................................................................  5
3.  DUE DILIGENCE........................................................  7
4.  ROYALTIES............................................................  8
5.  REPORTS AND RECORDS.................................................. 10
6.  PATENT PROSECUTION................................................... 12
7.  INFRINGEMENT......................................................... 12
8.  PRODUCT LIABILITY.................................................... 14
9.  EXPORT CONTROLS...................................................... 15
10.  NON-USE OF NAMES.................................................... 15
11.  ASSIGNMENT.......................................................... 15
12.  DISPUTE RESOLUTION.................................................. 16
13.  TERMINATION......................................................... 16
14.  PAYMENTS, NOTICES
AND OTHER COMMUNICATIONS................................................. 18
15.  MISCELLANEOUS PROVISIONS............................................ 18

APPENDIX A............................................................... 20

APPENDIX B............................................................... 21

APPENDIX C............................................................... 22


                                       ii


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                      MASSACHUSETTS INSTITUTE OF TECHNOLOGY

                                       and

                            CHEUNG LABORATORIES, INC.

                            PATENT LICENSE AGREEMENT


         This  Agreement is made and entered  into this ____ day of  __________,
1996,  (the  "Effective  Date")  by  and  between  MASSACHUSETTS   INSTITUTE  OF
TECHNOLOGY,  a corporation  duly  organized  and existing  under the laws of the
Commonwealth   of   Massachusetts   and  having  its  principal   office  at  77
Massachusetts Avenue, Cambridge, Massachusetts 02139 (hereinafter referred to as
"M.I.T."), and CHEUNG LABORATORIES, INC., a corporation duly organized under the
laws of Maryland and having its principal  office at 10220-I Old Columbia  Road,
Columbia, MD 21046-1705 (hereinafter referred to as "Licensee").

                               W I T N E S S E T H
     WHEREAS,  M.I.T. is the owner of certain  Intellectual  Property Rights (as
later  defined  herein)  relating  to M.I.T.  Case No.  5493L,  U.S.  Patent No.
5,251-645,  "Adaptive  Hyperthermia  System" by Alan Fenn,  and M.I.T.  Case No.
5672L,  "Non- Invasive Monopole  Hyperthermia  Array for Brain Tumor Heating" by
Alan Fenn, and M.I.T.  Case No. 6512L "Minimally  Invasive Monopole Phased Array
Hyperthermia  Applicators for Treating Carcinoma" by Alan Fenn and has the right
to grant  licenses under said Patent Rights (as later defined  herein),  subject
only to a royalty-free,  nonexclusive  license  heretofore granted to the United
States Government;

     WHEREAS,   M.I.T.   desires  to  have  the  Patent  Rights   developed  and
commercialized  to  benefit  the  public  and is  willing  to  grant  a  license
thereunder;

     WHEREAS,  M.I.T. is the owner of certain rights,  title and interest in the
Program (as later defined herein) relating to M.I.T. Case No. 7299LS, "NULLGSC,"
by Alan J. Fenn and M.I.T. Case No. 7928LS,  "FOCUSGSC," by Alan J. Fenn subject
only to the  royalty-free,  nonexclusive  license  rights of the  United  States


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Government   pursuant  to  48  CFR  52.227-14   (Civilian   Agencies)  or  DFARS
252.227-7013 (Defense Agencies), and has the right to grant licenses thereunder;

     WHEREAS, M.I.T. desires to have the Program developed and commercialized to
benefit the public and is willing to grant a license thereunder;

         WHEREAS,  Licensee has represented to M.I.T., to induce M.I.T. to enter
into  this  Agreement,   that  Licensee  is  experienced  in  the   development,
production,  manufacture, marketing and sale of products similar to the Licensed
Product(s) (as later defined herein) and/or the use of the Licenses  Process(es)
(as  later  defined  herein)  and that it shall  commit  itself  to a  thorough,
vigorous  and  diligent  program  of  exploiting  the  Patent  Rights,  and to a
thorough,  vigorous and diligent program of exploiting the Patent Rights, and to
a thorough,  vigorous and diligent  program of exploiting  the Program,  so that
public  utilization shall result  therefrom,  all in the manner provided herein;
and

         WHEREAS,  Licensee  desires to obtain a license under the Patent Rights
and also  desires  to  obtain a  license  to the  Program,  upon the  terms  and
conditions hereinafter set forth.

         NOW, THEREFORE,  in consideration of the premises and the mutual terms,
conditions and covenants contained herein, the parties hereto agree as follows:


                                 1. DEFINITIONS

         For purposes of this  Agreement,  the following words and phrases shall
have the following meanings:

         1.1. "Licensee" shall include a related company of Cheung Laboratories,
Inc., the voting stock of which is directly or indirectly at least fifty percent
(50%) owned or controlled by Cheung  Laboratories,  Inc., an organization  which
directly or  indirectly  controls  more than fifty  percent  (50%) of the voting
stock of Cheung Laboratories,  Inc. and an organization,  the majority ownership
of  which  is  directly  or  indirectly   common  to  the  ownership  of  Cheung
Laboratories, Inc.

         1.2.    "Patent  Rights"  shall  mean  all  of  the  following   M.I.T.
intellectual property:

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                  (a)      the United States patents listed in Appendix A;

                  (b)      the  United  States  patent  applications  listed  in
                           Appendix A, and divisionals, continuations and claims
                           of  continuation-in-part  applications which shall be
                           directed to subject matter specifically  described in
                           such patent applications, and the resulting patents;

                  (c)      any patents resulting from reissues or reexaminations
                           of the United States patents described in (a) and (b)
                           above;

                  (d)      the Foreign patents listed in Appendix A;

                  (e)      the Foreign patent applications listed in Appendix A,
                           and   divisionals,   continuations   and   claims  of
                           continuation-in-part   applications  which  shall  be
                           directed to subject matter specifically  described in
                           such Foreign patent  applications,  and the resulting
                           patents;

                  (f)      Foreign patent applications filed after the Effective
                           Date  in  the  countries  listed  in  Appendix  B and
                           divisionals,     continuations    and    claims    of
                           continuation-in-part   applications  which  shall  be
                           directed to subject matter specifically  described in
                           such patent applications,  and the resulting patents;
                           and

                  (g)      any  Foreign   patents,   resulting  from  equivalent
                           Foreign  procedures  to United  States  reissues  and
                           reexaminations,  of the Foreign patents  described in
                           (d), (e) and (f) above.

         1.3.     "Copyright" shall mean M.I.T.'s copyrights in the Program.

         1.4.  "Program"  shall  mean the  computer  program(s),  "NULLGSC"  and
"FOCUSGSC"   and  related   documentation,   if  any  described  in  Appendix  C
(hereinafter  the  "M.I.T.   Copyrighted  Program"),   and  shall  also  include
Adaptations,  Derivative Works and Translations.  Program shall also include any
additional  computer  programs,   including  but  not  limited  to  acceleration
software,  developed  for use  with  any of the  Intellectual  Property  Rights.
Program may be protected by both Patent Rights and Copyrights.

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         1.5.     "Adaptations" shall mean  the Program as it  may be adapted by
 Licensee for hardware other than the original M.I.T. Cray computer.

         1.6.  "Derivative  Works"  shall  mean a program  that uses the  M.I.T.
Copyrighted  Program and/or Adaptation,  but which has enhanced and new features
or fewer  features.  Licensee  shall be entitled to  establish  all  proprietary
rights for itself in the intellectual  property  represented by Licensee-created
enhancements  and  new  features,  whether  in  the  nature  of  trade  secrets,
copyrights  or patent  rights  or other  rights.  M.I.T.  shall be  entitled  to
establish  all  proprietary  rights  for  itself  in the  intellectual  property
represented  by  M.I.T.-created  enhancements  and new features,  whether in the
nature of copyrights or patent rights or other rights.

         1.7. "Translation" shall mean a translation of the Program into another
language.

         1.8. "Intellectual Property Rights" shall mean all of the Patent Rights
and Copyright.

         1.9.    A "Licensed Product" shall mean Licensee's hyperthermia machine
and accessories, or part thereof which:

                  (a)      is  covered  in  whole  or  in  part  by  an  issued,
                           unexpired  claim or a pending claim  contained in the
                           Patent  Rights  in the  country  in  which  any  such
                           Licensed  Product or part  thereof  is made,  used or
                           sold; or

                  (b)      is  manufactured by using a process or is employed to
                           practice  a process  which is  covered in whole or in
                           part by an issued, unexpired claim or a pending claim
                           contained in the Patent Rights in the county in which
                           any Licensed Process is used or in which such product
                           or part thereof is used or sold.

                  (c)      is covered by the Copyright.

         1.10. A "Licensed  Process"  shall mean any process which is covered in
whole or in part by an issued,  unexpired  claim or a pending claim contained in
the Patent Rights, or is covered by the Copyright.

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         1.11. "Net Sales" shall mean Licensee's and its sublicensees' billings,
including  Treatment Revenue,  for Licensed Products and Licensed Processes less
the sum of the  following  items,  providing  that  these  items are  payable by
Licensee  or  deductible  from  Licensee's  billings  within  sixty (60) days of
receiving payments from Licensee's customer(s):

                  (a)      discounts allowed  in amounts customary  in the trade
                           for   quantity   purchases,  cash   payments,  prompt
                           payments, wholesalers and distributors;

                  (b)      sales,  tariff  duties  and/or  use  taxes   directly
                           imposed and with reference to particular sales;

                  (c)      outbound transportation prepaid or allowed;

                  (d)      amounts allowed or credited on returns; and

                  (e)      allowance  for  bad  debt, not to exceed Five Percent
                           (5%) of Net Sales per calendar year.

         No other  deductions  shall be made for commissions paid to individuals
whether  they be with  independent  sales  agencies  or  regularly  employed  by
Licensee and on its payroll,  or for the cost of collections.  Licensed Products
shall be considered "sold" ninety (90) days after billing or invoicing,  or upon
receipt of payment,  whichever  comes first,  provided,  however,  that Licensed
Products are actually  shipped to customers.  If a Licensed  Product or Licensed
Process shall be  distributed or invoiced for a discounted  price  substantially
lower than  customary in the trade or  distributed  at no cost to  affiliates or
otherwise,  Net Sales  shall be based on the  customary  amount  billed for such
Licensed Products or Licensed Processes.

         1.12.    "Field of Use One" shall mean Breast Hyperthermia.

         1.13.    "Field of Use Two" shall mean Head and Neck Hyperthermia.

         1.14.    "Field of Use Three"  shall mean  Deep Seated  Hyperthermia of
other organs, including, but not limited to, liver, lung and prostate.


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         1.15.  On the  Effective  Date,  "Exclusive  Fields of Use" shall mean,
Field of Use One, Field of Use Two, and Field of Use Three.  This definition may
be modified according to paragraphs 3.3(b), 3.4(b) and 3.5(b).

         1.16.  "Other  Revenue" shall mean  Licensee's  gross revenues from the
sale of services,  including but not limited to, fees for  consulting,  research
and development, and training in connection with:

                  a.       the sublicensing of  the Intellectual Property Rights
                  and/or;

                  b.       the use of sale, lease or  other transfer of Licensed
                  Products or Licensed Processes.

         1.17.    "End User" shall  mean a customer  authorized to  use a single
copy of the Licensed  Product for  internal purposes  only and  not  for further
distribution.


                                    2. GRANT

         2.1.  M.I.T.  hereby grants to Licensee the right and license for Field
of Use One,  Field of Use Two,  and  Field of Use  Three to  practice  under the
Patent Rights and, to the extent not prohibited by other patents,  to make, have
made, use, lease, sell and import Licenses Products and to practice the Licensed
Processes,  until the  expiration  of the last to expire of the  Patent  Rights,
unless this Agreement shall be sooner terminated according to the terms hereof.

         2.2.     M.I.T. hereby  grants to  Licensee the  following  rights  and
licenses for the  Exclusive Fields of Use to  the end of the term  for which the
Copyright shall be granted, unless this Agreement shall be sooner terminated:

                  (a)      to use and reproduce the Program;

                  (b)      to create Derivatives;

                  (c)      to lease, transfer  and sublicense  Licensed Products
                           to  End-Users  through   the   normal   channels   of
                           distribution; and


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                  (d)      to grant any or  all of the above rights and licenses
                           to Sublicensees.

         2.3. In order to establish a period of exclusivity for Licensee, M.I.T.
hereby agrees that it shall not grant any other license to the Patent Rights for
the Exclusive  Fields of Use, and also that it shall not grant any other license
to the Copyright for the Exclusive  Fields of Use, subject only to Paragraph 2.6
and to the  royalty-free,  nonexclusive  license  rights  of the  United  States
Government   pursuant  to  48  CFR  52.227-  14  (Civilian  Agencies)  or  DFARS
252.227-7013  (Defense  Agencies)  during the period of time commencing with the
Effective Date and terminating with the first to occur of:

                  (a)      the expiration  of  ten (10) years  after  the  first
                           commercial  sale  of  a  Licensed  Product  or  first
                           commercial use of a Licensed Process; or

                  (b)      the  expiration  of  twelve  (12)  years  after   the
                           Effective Date of this Agreement.

         2.4. At the end of the exclusive period,  the license granted hereunder
shall become  nonexclusive  and shall extend to the end of the term or terms for
which any Patent  Rights are issued,  unless sooner  terminated  as  hereinafter
provided.  The period of exclusivity may be extended with the written consent of
M.I.T.,  on a field of use  basis,  which  consent  shall  not  unreasonably  be
withheld,  provided that Licensee is a licensee in good standing, owing no fees,
royalties  or any other  monies to  M.I.T.,  and  having  met all the  diligence
milestones  pertaining to the  particular  field of use in which an extension of
the period of exclusivity is under consideration.

         2.5.     M.I.T. reserves  the right to practice under the Patent Rights
for its own noncommercial research purposes.

         2.6.     M.I.T. reserves the right  to use  the  Program,  to  use  and
create derivatives  of the  Program and  to distribute  the Program  and M.I.T.-
created derivatives to third parties for noncommercial research purposes.

         2.7.     Licensee  agrees that Licensed Products  leased or sold in the
United States shall be manufactured substantially in the United States.


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         2.8.     In order  to  encourage  and  facilitate  the  development  of
Licensed Products, M.I.T. agrees to perform the work described in the Technology
Transfer Agreement attached to this license as Addendum A.

         2.9.   Licensee  shall  have  the  right  to  enter  into  sublicensing
agreements for the rights, privileges and licenses granted hereunder only during
the exclusive  period of this  Agreement.  Such  sublicenses may extend past the
expiration date of the exclusive  period of this Agreement,  but any exclusivity
of such sublicenses shall expire upon the expiration of Licensee's  exclusivity.
Upon  any  termination  of  this  Agreement,  sublicensees'  rights  shall  also
terminate, subject to Paragraph 13.6 hereof.

         2.10.  Licensee agrees that any sublicenses granted by it shall provide
that the  obligations to M.I.T. of Articles 2, 5, 7, 8, 9, 10, 12, 13, and 15 of
this  Agreement  shall be binding upon the  sublicensee as if it were a party to
this  Agreement.  Licensee  further agrees to attach copies of these Articles to
sublicense agreements.

         2.11.   Licensee  agrees  to  forward  to  M.I.T. a copy of any and all
sublicense agreements promptly upon execution by the parties.

         2.12. Licensee shall not receive from sublicensees anything of value in
lieu of cash payments in consideration  for any sublicense under this Agreement,
without the express prior written permission of M.I.T.

         2.13. The license  granted  hereunder  shall not be construed to confer
any rights  upon  Licensee  by  implication,  estoppel  or  otherwise  as to any
technology not specifically set forth in Appendix A hereof.


                                3. DUE DILIGENCE

         3.1.  Licensee shall use its best efforts to bring one or more Licensed
Products or  Licenses  Processes  to market  through a  thorough,  vigorous  and
diligent  program for  exploitation of the  Intellectual  Property Rights and to
continue active, diligent marketing efforts for one or more Licensed Products or
Licensed Processes throughout the life of this Agreement.


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         3.2.     (a)      In addition, pertaining to Field of Use One, Licensee
         shall adhere to the following milestones.

                           (i)      On or before  December  31,  1996,  Licensee
                                    shall deliver a Licensed Product to one site
                                    suitable  for  clinical  testing in Field of
                                    Use One.

                           (ii)     On or before June 30, 1997,  Licensee  shall
                                    deliver  to M.I.T.  clinical  data  obtained
                                    from at least ten (10) patients  enrolled in
                                    the clinical trials referred to in 3.2(a)(i)
                                    above.

                           (iii)    As soon as possible, but in all events on or
                                    before June 30, 1999,  Licensee  shall apply
                                    for FDA approval for  commercial  sales of a
                                    Licensed Product in Field of Use One.

                           (iv)     Licensee   shall  make  sales  of   Licensed
                                    Products  in Field of Use One  according  to
                                    the following schedule:

                                    1998                        at least 1 unit
                                    1999                        at least 5 units
                                    2000                       at least 10 units
                                    2001 and each  year thereafter  at  least 25
                                     units

                  (b)      In addition, pertaining to Field of Use Two, Licensee
                           shall develop a business  plan for  commercialization
                           of the  Intellectual  Property Rights in Field of Use
                           Two and  submit  it to M.I.T.  on or before  June 30,
                           1997.

                  (c)      In  addition,  pertaining  to  Field  of  Use  Three,
                           Licensee  shall seek to include  in the protocols for
                           the  clinical  trials  to  be  conducted  pursuant to
                           Section 3.2(a),  clinical testing directed toward the
                           commercialization of the Intellectual Property Rights
                           in Field of Use Three.   On  or  before September 30,
                           1996,  Licensee  shall  provide  M.I.T.  a definitive
                           business  plan  for  such  commercialization  of  the
                           Intellectual Property Rights in Field of Use Three.

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         3.3.     (a)      Failure to comply with paragraphs 3.2(a)(i), (ii), or
                           (iii), shall be  grounds for M.I.T. to terminate this
                           license pursuant to paragraph 13.3 hereof.

                  (b)      Failure to comply with paragraph  3.2(a)(iv) shall be
                           grounds   to  remove   Field  of  Use  One  from  the
                           definition  of  "Exclusive  Fields  of Use",  thereby
                           terminating  Licensee's  exclusive rights to Field of
                           Use One.

         3.4.     Failure to comply  with paragraphs 3.2(b) shall be grounds for
M.I.T. to  terminate the  grant in  paragraph 2.1 of  rights to Field of Use Two
pursuant to paragraph 13.3 hereof.

         3.5.     Failure to comply with  paragraphs 3.2(c) shall be grounds for
M.I.T. to terminate  the grant in  paragraph 2.1 of rights to Field of Use Three
pursuant to paragraph 13.3 hereof.


                                  4. ROYALTIES

         4.1.     For the  rights,  privileges and  license  granted  hereunder,
Licensee shall pay royalties to M.I.T. in the manner hereinafter provided to the
end  of  the  term  of  the  Patent  Rights  or  until this  Agreement  shall be
terminated:

                  (a)      License   Issue   Fee  of   [Confidential   Treatment
                           Requested],  which  said  License  Issue Fee shall be
                           deemed  earned  and due  according  to the  following
                           schedule:

                           (i)      [Confidential Treatment  Requested] shall be
                                    due on the Effective Date.

                           (ii)     [Confidential Treatment Requested] shall  be
                                    due June 15, 1996.

                           (iii)    [Confidential Treatment Requested]  shall be
                                    due  upon  Licensee's  raising the first One
                                    Hundred Thousand Dollars

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                                    of investment  capital  directly  related to
                                    the  commercialization  of  the Intellectual
                                    Property Rights.

                  (b)      License  Maintenance  Fees of [Confidential Treatment
                           Requested]  per year  payable  on  January  1,  1997,
                           January 1, 1998  and on  January 1,  1999;  provided,
                           however, that Running Royalties  subsequently due  on
                           Net  Sales  for  each  paid  year, if  any,  shall be
                           creditable  against  the  License Maintenance Fee for
                           said year. License Maintenance Fees paid in excess of
                           Running  Royalties shall not be creditable to Running
                           Royalties for future years.

                  (c)      License  Maintenance Fees of [Confidential  Treatment
                           Requested] per year payable on January 1, 2000 and on
                           January  1,  2001  provided,  however,  that  Running
                           Royalties subsequently due on Net Sales for each said
                           year, if any, shall be creditable against the License
                           Maintenance  Fee for said year.  License  Maintenance
                           Fees paid in excess of Running Royalties shall not be
                           creditable to Running Royalties for future years.

                  (d)      License  Maintenance Fees of [Confidential  Treatment
                           Requested] per year payable on January 1, 2002 and on
                           January 1 of each year thereafter; provided, however,
                           License  Maintenance  Fees may be credited to Running
                           Royalties subsequently due on Net Sales for each said
                           year, if any. License Maintenance Fees paid in excess
                           of  Running  Royalties  shall  not be  creditable  to
                           Running Royalties for future years.

                  (e)      Running Royalties in an amount equal to [Confidential
                           Treatment  Requested]  percent  (__%) of Net Sales of
                           the Licensed  Products and Licenses  Processes  used,
                           leased  or sold by and/or  for  Licensee  and/or  its
                           sublicensees  for  Licensed  Products  which are both
                           made and  leased or sold and for  Licensed  Processes
                           which are both  used and  leased or sold in a country
                           in which there is a valid,  issued  claim of a patent
                           described in either Appendices A or B.


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                  (f)      Running Royalties in an amount equal to [Confidential
                           Treatment Requested]  percent (__%)  of Net  Sales of
                           the Licensed  Products  and Licensed  Processes used,
                           leased or  sold  by  and/or for  Licensee  and/or its
                           sublicensees for  Licensed Products  which are either
                           made or  leased or  sold and for  Licensed  Processes
                           which are  either used or leased or sold in a country
                           in which there is a valid,  issued claim  of a patent
                           described  in  either  Appendices  A or B,  or  in  a
                           country in which there  is a pending claim pertaining
                           to M.I.T.  Case 6521L, providing that such country is
                           Canada.

                  (g)      Running Royalties in an amount equal to [Confidential
                           Treatment Requested]  percent (__%) of  Net Sales  of
                           the Licensed Products and  Licensed  Processes  used,
                           leased  or  sold  by  and/or   for  Licensee   and/or
                           its  sublicensees  for  Licensed  Products  which are
                           neither  made nor  leased  nor  sold in  a country in
                           which  there  is  a  valid,  issued claim of a patent
                           described in  either Appendices  A  or B,  but  which
                           utilize the  Copyright and/or  practice  of  run  the
                           Program, as  described in Appendix C and for Licensed
                           Processes which are  neither used nor leased nor sold
                           in  a  country  in  which,  but   which  utilize  the
                           Copyright  and/or  practice  or  run  the  Program as
                           described in Appendix C.

                  (h)      Running Royalties in an amount equal to [Confidential
                           Treatment  Requested]  percent  (__%) of Net Sales of
                           the Program  delivered to End-Users if the Program is
                           sold separately from the Licensed Products.

                  (i)      If Other  Revenue  is greater  than Net  Sales,  then
                           Running Royalties in an amount equal to [Confidential
                           Treatment Requested] (__%) of Other Revenue;

                  (j)      If Other Revenue is less than Net Sales, then Running
                           Royalties  in  an  amount   equal  to   [Confidential
                           Treatment Requested] (__%) of Other Revenue.



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         4.2.  All  payments  due  hereunder  shall  be  paid in  full,  without
deduction  of taxes or other fees which may be  imposed  by any  government  and
which shall be paid by Licensee.

         4.3.  No  multiple  royalties  shall be payable  because  any  Licensed
Product,  its  manufacture,  use,  lease or sale are or shall be covered by more
than  one  Intellectual  Property  Rights  patent  application  of  Intellectual
Property Rights patent licensed under this Agreement.

         4.4.  Royalty  payments  shall  be paid in  United  States  dollars  in
Cambridge,  Massachusetts,  or at such  other  place as  M.I.T.  may  reasonably
designate  consistent with the laws and  regulations  controlling in any foreign
country.  If any currency  conversion  shall be required in connection  with the
payment  of  royalties  hereunder,  such  conversion  shall be made by using the
exchange rate prevailing at the Chase Manhattan Bank (N.A.) on the last business
day of the calendar  quarterly  reporting  period to which such royalty payments
relate.

                             5. REPORTS AND RECORDS

         5.1.  Licensee  shall keep  full,  true and  accurate  books of account
containing all particulars  that may be necessary for the purpose of showing the
amounts  payable to M.I.T.  hereunder.  Said  books of account  shall be left at
Licensee's principal place of business or the principal place of business of the
appropriate division of Licensee to which this Agreement relates. Said books and
the  supporting  data shall be open at all  reasonable  times for five (5) years
following the end of the calendar year to which they pertain,  to the inspection
of  M.I.T.  or its  agents  for the  purpose  of  verifying  Licensee's  royalty
statement or  compliance  in other  respects  with this  Agreement.  Should such
inspection lead to the discovery of a greater than Ten Percent (10%) discrepancy
in reporting to M.I.T.'s  detriment,  Licensee agrees to pay the reasonable cost
of such inspection.

         5.2. Licensee shall deliver to M.I.T. true and accurate reports, giving
such  particulars  of the business  conducted  by Licensee and its  sublicensees
under this  Agreement as shall be pertinent  to  diligence  under  Article 3 and
royalty accounting hereunder:


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<PAGE>


                  (a)      before  the  first  commercial  sale  of  a  Licensed
                           Product or Licensed  Process, annually, on January 31
                           or each year; and

                  (b)      after the first commercial sale of a Licensed Product
                           or Licensed  Process,  quarterly,  within  sixty (60)
                           days  after  March  31,  June  30,  September  30 and
                           December 31, of each year.

         These reports shall include at least the following:

                  (a)      number of Licensed Products manufactured, leased  and
                           sold by and/or for Licensee and all sublicensees;

                  (b)      accounting for all Licensed Processes used or sold by
                           and/or for Licensee and all sublicensees;

                  (c)      accounting for  Net Sales, noting  the deductions and
                           credits applicable as provided in Paragraphs 1.11 and
                           6.3, accounting for Other Revenue;

                  (d)      Running Royalties due under Paragraph 4.1(e) and (f);

                  (e)      Running Royalties due under Paragraph 4.1(g) and (h);

                  (f)      total royalties due; and

                  (g)      names and addresses of all sublicensees of Licensee.

         5.3.     With each such report submitted, Licensee  shall pay to M.I.T.
the royalties due and payable  under  this  Agreement.  If no royalties shall be
due, Licensee shall so report.

         5.4.  On or before  the  ninetieth  (90th) day  following  the close of
Licensee's fiscal year, Licensee shall provide M.I.T. with Licensee's  certified
financial  statements for the preceding fiscal year including,  at a minimum,  a
Balance Sheet and an Operating Statement.


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<PAGE>


         5.5. The royalty  payments set forth in this  Agreement and amounts due
under Article 6 shall,  if overdue,  bear interest  until payment at a per annum
rate two percent (2%) above the prime rate in effect at the Chase Manhattan Bank
(N.A.) on the due date. The payment of such interest shall not foreclose  M.I.T.
from exercising any other rights it may have as a consequence of the lateness of
any payment.


                              6. PATENT PROSECUTION

         6.1. M.I.T. shall have the administrative  responsibility to apply for,
see,  prompt  issuance of, and maintain  during the term of this  Agreement  the
Patent  Rights in the  United  States  and in the  foreign  countries  listed in
Appendices A and B hereto. Appendix B may be amended by verbal agreement of both
parties,  such  agreement to be confirmed in writing  within ten (10) days.  The
prosecution, filing and maintenance of all Patent Rights patens and applications
shall be the primary responsibility of M.I.T.; provided, however, Licensee shall
have reasonable  opportunities  to advise M.I.T. and shall cooperate with M.I.T.
ion such prosecution, filing and maintenance.

         6.2.     Payment  of  all  fees  and  costs  relating  to  the  filing,
prosecution, and  maintenance of the  Patent Rights  incurred after  the date of
this  Agreement  shall  be  the  responsibility  of  Licensee.   M.I.T.  is  not
financially obliged to maintain and prosecute patents.

         6.3.     M.I.T. agrees  that  Licensee  may  take  a  cumulative   life
of license credit  for expenditures  on  the  Patent Rights,  such credit not to
exceed [Confidential Treatment Requested]  and  to  be  taken  according  to the
following schedule:

                  (a)      Licensee  may credit  their above  referenced  patent
                           prosecution and maintenance  expenditures incurred in
                           a  given  calendar  year  against  up to one  half of
                           License  Maintenance Fees due the following January 1
                           under paragraphs 4.1(b), (c), and (d).

                  (b)      In  the  event  that  Running  Royalties  exceed  the
                           License   Maintenance  Fee  for  a  given  year,  and
                           Licensee owes M.I.T. Running Royalties in addition to
                           the  License   Maintenance  Fee  already  paid,  then
                           Licensee may use their patent prosecution and

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<PAGE>

                           maintenance  credit  against  up  to  one half of the
                           Running Royalties due paragraphs 4.1(e), (f) and (g).


                                 7. INFRINGEMENT

     7.1.  Licensee  shall  inform  M.I.T.  promptly  in writing of any  alleged
infringement  of the  Intellectual  Property Rights by a third party of which it
becomes  aware  and of any  available  evidence  thereof.  M.I.T.  shall  inform
Licensee  promptly in writing of any alleged  infringement  of the  Intellectual
Property  Rights by a third party of which it becomes aware and of any available
evidence thereof. Within ten (10) business days of such notice the parties shall
confer to determine how best to proceed.

     7.2. During the term of this Agreement,  M.I.T.  shall have the right,  but
shall not be obligated, to prosecute at its own expense all infringements of the
Intellectual  Property Rights and, in furtherance of such right, Licensee hereby
agrees that M.I.T.  may include  Licensee as a party plaintiff in any such suit,
without  expense to  Licensee.  The total cost of any such  infringement  action
commenced or defended solely by M.I.T. shall be borne by M.I.T. and M.I.T. shall
keep any recovery or damages for past infringement derived therefrom.

     7.3. If within six (6) months  after  having  been  notified of any alleged
infringement,  M.I.T.  shall have been  unsuccessful  in persuading  the alleged
infringer  to  desist  and shall not have  brought  and shall not be  diligently
prosecuting an infringement  action,  or if M.I.T.  shall notify Licensee at any
time  prior  thereto of its  intention  not to bring suit  against  any  alleged
infringer for the Field of Use, then,  and in those events only,  Licensee shall
have the right, but shall not be obligated,  to prosecute at its own expense any
infringement  of the  Intellectual  Property  Rights  for the Field of Use,  and
Licensee  may, for such  purposes,  use the name of M.I.T.  as party  plaintiff;
provided,  however,  that such right to bring such an infringement  action shall
remain  in  effect  only  for so  long as the  license  granted  herein  remains
exclusive. No settlement,  consent judgment or other voluntary final disposition
of the suit may be entered  into  without the consent of M.I.T.,  which  consent
shall not unreasonably be withheld.  Licensee shall indemnify M.I.T. against any
order for costs that may be made against M.I.T. in such proceedings.


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<PAGE>






         7.4. In the event that Licensee shall undertake the enforcement  and/or
defense of the Intellectual Property Rights by litigation, Licensee may withhold
up to fifty percent (50%) of the payments otherwise  thereafter due M.I.T. under
Article 4  hereunder  and apply the same toward  reimbursement  of up to half of
Licensee's  expenses,   including  reasonable  attorneys'  fees,  in  connection
therewith.  Any  recovery  of  damages by  Licensee  for each such suit shall be
applied first in  satisfaction  of any  unreimbursed  expenses and legal fees of
Licensee relating to such suit, and next toward  reimbursement of M.I.T. for any
payments  under  Article 4 past due or  withheld  and  applied  pursuant to this
Article 7. The balance remaining from any such recovery shall be divided so that
the percentage of the recovery due M.I.T.  is calculated by creating a fraction,
the numerator of which is the amount of royalties  withheld,  and denominator of
which is the cost of litigation paid by Licensee, but in no event shall such sum
be less than Ten Percent (10%) of the net recovery.

         7.5.  In  the  event  that  a  declaratory   judgment  action  alleging
invalidity or noninfringement  of any of the Intellectual  Property Rights shall
be brought against Licensee, M.I.T., at its option, shall have the right, within
thirty (30) days after  commencement of such action,  to intervene and take over
the sole defense of the action at its own expense.

         7.6. In any infringement  suit as either party may institute to enforce
the Patent Rights pursuant to this  Agreement,  the other party hereto shall, at
the request  and expense of the party  initiating  such suit,  cooperate  in all
respects and, to the extent possible,  have its employees testify when requested
and make available relevant records, papers,  information,  samples,  specimens,
and the like.

         7.7.  Licensee,  during the exclusive  period of this Agreement,  shall
have the sole  right in  accordance  with the  terms  and  conditions  herein to
sublicense  any  alleged  infringer  for the Field of Use for  future use of the
Intellectual  Property  Rights.  Any upfront  fees as part of such a  sublicense
shall be shared equally  between  Licensee and M.I.T.;  other royalties shall be
treated per Article 4.


                              8. PRODUCT LIABILITY

     8.1.  Licensee  shall at all times  during the term of this  Agreement  and
thereafter,   indemnify,  defend  and  hold  M.I.T.,  its  trustees,  directors,
officers, employees

301650.001(BF)                            17


<PAGE>

and  affiliates,   harmless  against  all  claims,   proceedings,   demands  and
liabilities  of any kind  whatsoever,  including  legal  expenses and reasonable
attorneys' fees,  arising out of the death of or injury to any person or persons
or out of any damage to property,  resulting from the  production,  manufacture,
sale, use, lease, consumption or advertisement of the Licensed Product(s) and/or
Licensed Process(es) or arising from any obligation of Licensee hereunder.

         8.2.  Licensee  shall  obtain  and  carry  in  full  force  and  effect
commercial,  general liability insurance which shall protect Licensee and M.I.T.
with respect to events covered by Paragraph 8.1 above.  Such insurance  shall be
written by a  reputable  insurance  company  authorized  to do  business  in the
Commonwealth of Massachusetts,  shall list M.I.T. as an additional named insured
thereunder,  shall be endorsed to include product  liability  coverage and shall
require  thirty  (30) days  written  notice  to be given to M.I.T.  prior to any
cancellation or material change thereof.  The limits of such insurance shall not
be less than One Million Dollars  ($1,000,000)  per occurrence with an aggregate
of Three Million  Dollars  ($3,000,000)  for personal  injury or death,  and One
Million Dollars  ($1,000,000)  per occurrence with an aggregate of Three Million
Dollars  ($3,000,000)  for property damage.  Licensee shall provide M.I.T.  with
Certificates of Insurance evidencing the same.

         8.3. EXCEPT AS OTHERWISE EXPRESSLY SET FORTH IN THIS AGREEMENT, M.I.T.,
ITS  TRUSTEES,   DIRECTORS,   OFFICERS,   EMPLOYEES,   AND  AFFILIATES  MAKE  NO
REPRESENTATIONS AND EXTENT NO WARRANTIES OF ANY KIND, EITHER EXPRESS OR IMPLIED,
INCLUDING  BUT NOT  LIMITED TO  WARRANTIES  OF  MERCHANTABILITY,  FITNESS  FOR A
PARTICULAR PURPOSE,  VALIDITY OF PATENT RIGHTS CLAIMS, ISSUED OR PENDING, AND TO
THE  COPYRIGHT  AND THE  ABSENCE  OF LATENT  OR OTHER  DEFECTS,  WHETHER  OR NOT
DISCOVERABLE.  NOTHING IN THIS AGREEMENT SHALL BE CONSTRUED AS A  REPRESENTATION
MADE OR WARRANTY  GIVEN BY M.I.T.  THAT THE  PRACTICE BY LICENSEE OF THE LICENSE
GRANTED  HEREUNDER  SHALL NOT INFRINGE THE PATENT RIGHTS OR THE COPYRIGHT OF ANY
THIRD  PARTY.  IN NO EVENT SHALL  M.I.T.,  ITS  TRUSTEES,  DIRECTORS,  OFFICERS,
EMPLOYEES AND  AFFILIATES BE LIABLE FOR INCIDENTAL OR  CONSEQUENTIAL  DAMAGES OF
ANY KIND,  INCLUDING  ECONOMIC  DAMAGE OR INJURY TO PROPERTY  AND LOST  PROFITS,
REGARDLESS OF WHETHER M.I.T. SHALL BE ADVISED, SHALL

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<PAGE>


HAVE  OTHER  REASON TO KNOW,  OR IN FACT SHALL  KNOW OF THE  POSSIBILITY  OF THE
FOREGOING.


                               9. EXPORT CONTROLS

         Licensee  acknowledges  that it is  subject to United  States  laws and
regulations  controlling  the  export  of  technical  data,  computer  software,
laboratory  prototypes and other commodities  (including the Arms Export Control
Act,  as  amended  and  the  United  States   Department   of  Commerce   Export
Administration  Regulations).  The  transfer of such items may require a license
from the  cognizant  agency  of the  United  States  Government  and/or  written
assurances  by Licensee that Licensee  shall not export data or  commodities  to
certain foreign countries without prior approval of such agency.  M.I.T. neither
represents that a license shall not be required nor that, if required,  it shall
be issued.


                              10. NON-USE OF NAMES

         Licensee  shall not use the names or  trademarks  of the  Massachusetts
Institute of Technology or Lincoln Laboratory, nor any adaption thereof, nor the
names  of any of  their  employees,  in any  advertising,  promotional  or sales
literature without prior written consent obtained from M.I.T., or said employee,
in each case, except that Licensee may state that it is licensed by M.I.T. under
one or more of the patents and/or applications comprising the Patent Rights, and
that it has a license to the Copyright.


                                 11. ASSIGNMENT

         This  Agreement  is not  assignable  and any  attempt to do so shall be
void.


                             12. DISPUTE RESOLUTION

         12.1.  Except  for the  right  of  either  party to apply to a court of
competent   jurisdiction  for  a  temporary  restraining  order,  a  preliminary
injunction,  or other  equitable  relief to  preserve  the status quo or prevent
irreparable harm, any and all claims, disputes

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<PAGE>


or  controversies  arising under,  out of, on in connection  with the Agreement,
including any dispute  relating to patent  validity or  infringement,  which the
parties  shall be unable to resolve  within sixty (60) days shall be mediated in
good faith. The party raising such dispute shall promptly advise the other party
of such claim, dispute or controversy in a writing which describes in reasonable
detail the nature of such  dispute.  By not later  than five (5)  business  days
after the recipient  has received such notice of dispute,  each party shall have
selected for itself a  representative  who shall have the authority to bind such
party,  and shall  additionally  have  advised the other party in writing of the
name and title of such representative.  By not later than ten (10) business days
after the date of such notice of  dispute,  the party  against  whom the dispute
shall be  raised  shall  select a  mediation  firm in the  Boston  area and such
representatives  shall  schedule a date with such firm for a mediation  hearing.
The  parties  shall  enter into good faith  mediation  and shall share the costs
equally. If the representatives of the parties have not been able to resolve the
dispute within fifteen (15) business days after such mediation hearing, then any
and  all  claims,  disputes  or  controversies  arising  under,  out  of,  or in
connection  with  this  Agreement,  including  any  dispute  relating  to patent
validity or infringement,  shall be resolved by final and binding arbitration in
Boston,  Massachusetts under the rules of the American Arbitration  Association,
or the Patent Arbitration Rules if applicable,  then obtaining.  The arbitrators
shall  have no power to add to,  subtract  from or  modify  any of the  terms or
conditions of this Agreement,  not to award punitive damages. Any award rendered
in such  arbitration may be enforced by either party in either the courts of the
Commonwealth  of  Massachusetts  or in the United States  District Court for the
District of  Massachusetts,  to whose  jurisdiction for such purposes M.I.T. and
Licensee each hereby irrevocably consents and submits.

         12.2.  Notwithstanding the foregoing,  nothing in this Article shall be
construed to waive any rights or timely performance of any obligations  existing
under this Agreement.


                                 13. TERMINATION

         13.1. If Licensee shall cease to carry on its business,  this Agreement
shall terminate upon notice by M.I.T.

         13.2.    Should Licensee  fail to make  any payment whatsoever  due and
payable to M.I.T. hereunder,  M.I.T. shall  have the  right  to  terminate  this

301650.001(BF)                                     20


<PAGE>

Agreement effective on thirty (30) days' notice,  unless Licensee shall make all
such payments to M.I.T.  within said thirty (30) day period. Upon the expiration
of the thirty (30) day period, if Licensee shall not have made all such payments
to  M.I.T.,   the  rights,   privileges  and  license  granted  hereunder  shall
automatically terminate.

         13.3. Upon any material breach or default of this Agreement by Licensee
(including,  but not limited to, breach or default under Paragraph  3.3),  other
than those  occurrences set out in Paragraphs 13.1 and 13.2  hereinabove,  which
shall always take  precedence in that order over any material  breach or default
referred to in this  Paragraph  13.3,  M.I.T.  shall have the right to terminate
this  Agreement  and  the  rights,  privileges  and  license  granted  hereunder
effective on ninety (90) days' notice to Licensee. Such termination shall become
automatically  effective  unless  Licensee  shall have  cured any such  material
breach or default prior to the expiration of the ninety (90) days period.

         13.4.    Licensee shall have the  right to terminate  this Agreement at
any time on six (6) months'  notice to M.I.T., and  upon payment  of all amounts
due M.I.T. through the effective date of the termination.

         13.5. Upon termination of this Agreement for any reason, nothing herein
shall be construed  to release  either  party from any  obligation  that matured
prior to the effective date of such  termination;  and Articles 1, 8, 9, 10, 12,
13.5,  13.6,  and 15  shall  survive  any  such  termination.  Licensee  and any
sublicensee thereof may, however,  after the effective date of such termination,
sell all Licensed  Products,  and complete  Licensed  Products in the process of
manufacture  at the time of such  termination  and sell the same,  provided that
Licensee  shall make the  payments  to M.I.T.  as  required by Article 4 of this
Agreement and shall submit the reports required by Article 5 hereof.

         13.6.    Upon termination of this Agreement for any reason:

                  (a)      Licensee shall provide M.I.T. with  written assurance
                           that the  original and all  copies of the Program and
                           Derivatives, have been destroyed,  except that,  upon
                           prior written authorization from  M.I.T. Licensee may
                           retain a copy for archival purposes; and

                  (b)      the rights of  End-Users to the use  and enjoyment of
                           the  Licensed  Products  shall  not  be  abridged  or
                           diminished  in  any way,  except  that  any  End-User
                           leasing or sublicensing the Licensed Products and not

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<PAGE>

                           then in  default  shall  have  the  right to obtain a
                           lease  or  sublicense  directly  from  M.I.T.   under
                           reasonable terms and conditions.

     13.7.  Upon  termination of this Agreement for any reason,  any sublicensee
not then in default  shall have the right to seek a license  from M.I.T.  M.I.T.
agrees to  negotiate  such  licenses  in good faith under  reasonable  terms and
conditions.

<PAGE>

                              14. PAYMENTS, NOTICES
                            AND OTHER COMMUNICATIONS

         Any payment,  notice or other communication  pursuant to this Agreement
shall be sufficiently made or given on the date of mailing if sent to such party
by  certified  first class mail,  return  receipt  requested,  postage  prepaid,
addressed to it at its address below or as it shall  designate by written notice
given to the other party:

         In the case of M.I.T.:

                  Director
                  Technology Licensing Office
                  Massachusetts Institute of Technology
                  Room E32-300
                  Cambridge, Massachusetts  02139

         In the case of Licensee:

                  Augustine Y. Cheung
                  Chairman and CEO
                  Cheung Laboratories, Inc.
                  10220-I Old Columbia Road
                  Columbia, MD  21046-1705


                          15. MISCELLANEOUS PROVISIONS


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<PAGE>

         15.1. All disputes arising out of or related to this Agreement,  or the
performance,  enforcement,  breach  or  termination  hereof,  and  any  remedies
relating  thereto,  shall be  construed,  governed,  interpreted  and applied in
accordance with the laws of the Commonwealth of  Massachusetts,  U.S.A.,  except
that  questions  affecting  the  construction  and effect of any patent shall be
determined  by the law of the  country  in which  the  patent  shall  have  been
granted.

         15.2. The parties hereto acknowledge that this Agreement sets forth the
entire  Agreement  and  understanding  of the  parties  hereto as to the subject
matter hereof, and shall not be subject to any change or modification  except by
the execution of a written instrument signed by the parties.

         15.3. The provisions of this Agreement are severable,  and in the event
that any  provisions  of this  Agreement  shall be  determined  to be invalid or
unenforceable  under  any  controlling  body  of the  law,  such  invalidity  or
unenforceability  shall not in any way affect the validity of  enforceability of
the remaining provisions hereof.

         15.4.  Licensee agrees to mark the Licensed Products sold in the United
States with all applicable  United States patent numbers.  All Licensed Products
shipped  to or sold in other  countries  shall be  marked in such a manner as to
conform with the patent laws and practice of the country of manufacture or sale.

         15.5.  The failure of either  party to assert a right  hereunder  or to
insist upon  compliance  with any term or condition of this Agreement  shall not
constitute  a waiver of that  right or excuse a similar  subsequent  failure  to
perform any such term or condition by the other party.

         IN WITNESS  WHEREOF,  the parties have duly executed this Agreement the
day and year set forth below.

MASSACHUSETTS INSTITUTE OF                  CHEUNG LABORATORIES, INC.
TECHNOLOGY


By:/s/______________________________
By:/s/_______________________________


Name:_______________________________        Name:______________________________
Title:_______________________________       Title:_____________________________
 
Date:                                       Date:


                                   APPENDIX A


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<PAGE>


PATENT RIGHTS ON THE EFFECTIVE DATE

UNITED STATES PATENT RIGHTS

M.I.T. Case No. 5493L
U.S. Patent No. 5,251,645
"Adaptive Nulling Hyperthermia Array:
By Alan Fenn


M.I.T. Case No. 6512L
U.S. Serial Number 157,928
"Minimally Invasive Monopole Phased Array Hyperthermia Applicators
For Treating Breast Carcinomas"
By Alan Fenn


FOREIGN PATENT RIGHTS

M.I.T. Case No. 6512L
PCT Application designating EPO, Canada and Japan
"Minimally Invasive Monopole Phased Hyperthermia Applicators
For Treating Breast Carcinomas"
By Alan Fenn




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<PAGE>


                                   APPENDIX B

1.    Foreign  patent applications  and patents  within the  Patent Rights as of
Effective Date:


M.I.T. Case No. 6512L
PCT Application designating EPO, Canada and Japan
"Minimally Invasive Monopole Phased Hyperthermia Applicators
For Treating Breast Carcinomas"
By Alan Fenn



2.       Foreign countries in which Patent Rights shall be filed, prosecuted and
maintained in accordance with Article 6.


No additional instructions as of February 23, 1996.




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<PAGE>


                                   APPENDIX C

M.I.T. COPYRIGHTED SOFTWARE

M.I.T. Case No. 7299LS
"NULLGSC"
By Alan Fenn


M.I.T. Case No. 7298LS
"FOCUSGSC"
By Alan Fenn


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