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License Agreement - MMTC Inc. and Cheung Laboratories Inc.

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                           LICENSE AGREEMENT


         AGREEMENT,  dated August , 1996, by and between MMTC,  INC.  ("MMTC") a
Delaware  corporation having its principal  executive offices at 12 Roszel Road,
Suite A-203, Princeton, New Jersey 08450, and CHEUNG LABORATORIES, INC. ("CLI"),
a Maryland  corporation  having its principal  executive  offices at 10220-I Old
Columbia Rd. Columbia, MD 21046.

         WHEREAS,  MMTC owns or controls certain patents relating to a microwave
balloon  catheter  which may have  application  for treatment of diseases of the
prostate;

         WHEREAS, CLI desires to acquire a perpetual,  exclusive,  and worldwide
license under said patents for use in the Field (as defined below);

         WHEREAS,  MMTC is  willing  to grant  CLI said  license  for use in the
Field.

         NOW, THEREFORE, in consideration of the mutual covenants and agreements
provided herein, MMTC and CLI hereby agree as follows:


                                    SECTION 1 - DEFINITIONS

         For  purposes of this  Agreement  the  following  definitions  shall be
applicable:

         1.1 "Affiliate" shall mean, with respect to any party, a person,  firm,
partnership, trust, company or other entity which, directly or indirectly, ( i )
owns or controls said party,  or (ii) is owned or controlled by such party or by
any person,  firm,  partnership,  trust,  company or other  entity which owns or
controls,  directly or indirectly, said party. For purposes of this Section 1.1,
"owned" or "owns" shall mean the legal or beneficial  ownership of fifty percent
(50 %) or more of the issued and voting  capital or other  share  participation,
and  "controls"  or  "controlled"  shall mean the power to vote or direct  fifty
percent (50 %) or more of the voting  power or  otherwise  to direct the affairs
thereof, but only for so long as said ownership or control shall continue.


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         1.2 "Field"  shall mean the  treatment of prostatic  disease in humans,
excepting the treatment of cancer of the prostate.

         1.3 "Licensed  Patents"  shall mean only all patents listed in Appendix
I,  annexed  hereto and made a part hereof and any patents  which may issue from
applications   listed   on   Appendix   I,   together   with  all   divisionals,
continuations-in-part, patents of additions and extensions and reissues thereof.

         1.4 "Licensed  Products"  shall mean anything the  manufacture,  use or
sale of which would,  in the absence of a license,  infringe any of the Licensed
Patents and is used in the Field.

         1.5 "Net Sales"  shall mean gross sales of  Licensed  Products  sold by
CLI, its Affiliates and  sublicensees to third parties,  less the total of ( i )
ordinary  and  customary  cash and  trade  discounts,  ( ii )  returns,  ( iii )
allowances,  ( iv ) commissions  to independent  sales agents,  and (v ) excise,
sales or use taxes,  other  consumption  taxes,  customs  duties and  compulsory
payments to governmental authorities actually paid or deducted which are related
to gross sales of Licensed Products sold by CLI, its Affiliates and sublicensees
to their  distributors but shall not include sales by such distributors to third
parties.  In the event  that any  component  or item  within the  definition  of
"Licensed  Product"  hereunder is separately sold and is also sold as part of or
in  conjunction  with  another  significant  component  which is not  within the
definition of "Licensed Product",  then Net Sales thereof shall be determined as
if such item or component had been sold separately.

         1.6  "Nonpatent   Countries"  shall  mean  those  countries  where  the
manufacture, use or sale of the Licensed Products does not infringe an unexpired
Licensed Patent applicable to that country.

         1.7  "Patent   Countries"   shall  mean  those   countries   where  the
manufacture,  use or sale of the Licensed  Products  would,  in the absence of a
license, infringe an unexpired Licensed Patent applicable to that country.

         1.8 "Payment Computation Period" shall mean each fiscal quarter, or any
portion thereof,  ending on the last day of the third, sixth, ninth, and twelfth
accounting  periods of a given CLI fiscal year.  In the event CLI should  change
its fiscal year end so that CLI has a  transitional  fiscal year which is longer


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or  shorter  than  twelve  months,  the  Payment  Computation  Periods  for such
transitional  fiscal  year  shall  be  in  accordance  with  generally  accepted
accounting  principles and approximately equal to the length of three (3) fiscal
accounting periods in a fiscal year consisting of twelve months.

                          SECTION 2 - GRANT OF LICENSE

         2.1 Subject to the terms of this Agreement,  MMTC hereby grants to CLI,
and CLI hereby accepts, a perpetual,  exclusive and worldwide license,  to make,
have made,  use and sell the Licensed  Products in the Field.  It is  understood
that the foregoing  exclusive license grants to CLI the rights enumerated to the
exclusion of all other parties in the Field, including MMTC and its Affiliates.

                     SECTION 3 - LICENSE FEES AND ROYALTIES

         3.1 In consideration  of the patent  licenses,  CLI shall pay to MMTC a
license fee in the total  amount of  [Confidential  Treatment  Requested]  which
shall be payable within thirty (30) days after execution of this Agreement.  The
foregoing license fee paid to MMTC shall be creditable  against future royalties
due under Section 3.3 hereof.

         3.2 CLI shall pay MMTC an additional  license fee ("Additional  License
Fee") of [Confidential  Treatment Requested] for each failure by CLI to meet any
of the following development milestones by the specified date:

         ( i )    to commence a clinical safety trial with  not  less  than  ten
                  (10) patients by March 31, 1997;

         ( ii )   to file IDE within 6 months after signing of agreement; or

         ( iii )  to commence  clinical efficacy immediately upon receipt of IDE
                  approval.

CLI shall pay any required Additional License Fee to MMTC within sixty (60) days
after the  applicable  date set forth in  Section  3.2 ( i ), ( ii ), or ( iii )
above. CLI shall

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provide MMTC with written  notification  that it has met each of the development
milestones  set forth  above in  Section  3.2 ( i ) , ( ii ), and ( iii ) within
sixty (60) days of meeting such  milestone.  Notwithstanding  the  provisions of
this Section 3.2 , if CLI should fail to meet any of the development  milestones
set forth  above in Section 3.2 ( i ), ( ii ), or ( iii ), in lieu of paying the
required  Additional  License  Fee , CLI,  at its  option,  may  terminate  this
Agreement  and  relinquish  all its rights under this  Agreement to the Licensed
Patents. If CLI should fail to meet any of the development  milestones set forth
above  in  Section  3.2 ( i ), ( ii ),  or ( iii ) and  should  fail  to pay the
required  Additional  License  Fee,  MMTC,  at its option,  may  terminate  this
Agreement as provided in Section 12.2 hereof.  All Additional  License Fees paid
by CLI to MMTC shall be creditable  against  future  royalties due under Section
3.3 hereof.

         3.3 In  consideration  of the license  granted to CLI under Section 2.1
hereof , CLI shall pay to MMTC royalties based on Net Sales of Licensed Products
in Patent Countries as follows:

          ( i )   At  the  rate  of [Confidential Treatment Requested] of annual
Net Sales.

The royalties  payable under this Section 3.3 shall only be payable on Net Sales
in  Patent  Countries  and  shall  not be  payable  on Net  Sales  in  Nonpatent
Countries, regardless of the country of manufacture of the Licensed Product. The
duration of royalty  payments  under this section 3.3 shall be  determined  on a
county-by-country  basis and,  subject to the provisions of Sections 6.1 and 8.3
hereof,  shall  continue in each  country  until the  expiration  of the last to
expire of the  Licensed  Patents in such  country  with  claims  directed to the
Licensed Product sold in such country by CLI, its Affiliates and sublicensees.

         3.4 CLI  shall  pay MMTC  minimum  annual  royalties  of  [confidential
treatment requested] for a period of seven (7) years commencing with the earlier
of (i) the first full CLI fiscal year following the first  commercial  sale of a
Licensed  Product in the United  States and ( ii ) CLI's 2000  fiscal  year (the
fiscal year  beginning  after  December 31,  1999).  In the event the  royalties
payable  pursuant  to Section  3.3 hereof for any CLI fiscal year should be less
than the minimum annual royalties  payable for such fiscal year pursuant to this
section 3.4, then CLI, within sixty (60) days after the end of such fiscal year,
shall pay  to MMTC  an additional  royalty for  such fiscal  year which shall be

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equal to the difference  between the minimum annual royalty payable  pursuant to
this  Section 3.4 and the royalty  payable  pursuant  to Section  3.3.  for such
fiscal year. Any  additional  royalties paid by CLI pursuant to this Section 3.4
shall be creditable  against future  royalties due under Section 3.3 hereof.  If
CLI should  fail to pay MMTC the  additional  royalties  under this  Section 3.4
hereof for any CLI fiscal  year,  MMTC shall have the right,  at its option,  to
terminate this Agreement pursuant to Section 12.2 hereof. If CLI terminates this
Agreement  pursuant  to Sections  12.1 or 12.3,  CLI  obligations  to pay annual
minimum  royalties  pursuant to this Section 3.4 shall cease as of the effective
date of termination.

                    SECTION 4 - PAYMENT PROCEDURES, REPORTS,
                          RECORDS, TAXES, AND AUDITING

         4.1 Sales between or among CLI, its Affiliates and  sublicensees  shall
not be  subject  to  royalties  under  Section  3.3  hereof,  but in such  cases
royalties  shall be  calculated  upon Net Sales by such  persons to  independent
third parties,  including distributors.  CLI shall be responsible for payment of
any royalties  accrued on sales of Licensed  Products to such independent  third
parties through its Affiliates or sublicensees.

         4.2 CLI shall pay to MMTC  royalties  on Net Sales in Patent  Countries
during each Payment  Computation  Period within sixty (60) days after the end of
each such Payment Computation Period, and each payment shall be accompanied by a
report identifying the Licensed Product, the Net Sales in Patent Countries,  and
the royalties  payable to MMTC,  as well as  computation  thereof.  Said reports
shall be certified as true and correct by the  Controller  of CLI.  Said reports
shall be kept  confidential  by MMTC and not  disclosed to any party (other than
accountants  under  Section  4.3 hereof and  MMTC's  attorneys  who shall all be
subject to the same  obligations  of  confidentiality  as those  imposed on MMTC
hereunder) And shall only be used for the purposes of this Agreement.

         4.3 CLI shall, and shall cause its Affiliates and sublicensees to, keep
full and  accurate  books and  records  setting  forth  gross  sales of Licensed
Products  and  Net  Sales  in  Patent  Countries  and  amounts  payable  to MMTC
hereunder.  CLI shall permit MMTC, at MMTC's expense,  by independent  certified
public accountants employed by MMTC and acceptable to CLI, to examine such books
and records at any reasonable  time, but not later than two (2) years  following
the rendering of any

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such reports,  accountings, and payments. Such independent accountants shall not
disclose  to MMTC  any of CLI's  cost  data.  The  opinion  of said  independent
accountants regarding such reports,  accountings,  and payments shall be binding
on the parties hereto.

                           SECTION 5 - CONFIDENTIALITY

         5.1  During  the term of this  Agreement  and for a period  of ten (10)
years after  expiration or termination  hereof (except in case of termination by
MMTC under Sections 12.2 and 12.3 hereof),  MMTC shall keep confidential and not
disclose to others or use for any purpose,  other than as authorized herein, and
know-how,  data or information  directed to Licensed Products which is disclosed
to MMTC or its Affiliates by CLI; provided,  however, the foregoing  obligations
of confidentiality and non-use shall not apply to the extent that such know-how,
data and information is:

         ( i )    already known to MMTC at the time of disclosure  hereunder  of
                  hereafter developed  by MMTC  independent  of  any  disclosure
                  hereunder as MMTC can demonstrate by competent proof; or

         ( ii )   publicly  known prior  to or  after disclosure hereunder other
                  than through acts or omissions of MMTC, its Affiliates, or its
                  Affiliates' employees.

         5.2  During the term of this  Agreement  and for the period of ten (10)
years after expiration of termination  hereof,  CLI shall keep  confidential and
not disclose to others or use for any purpose,  other than as authorized herein,
and know-how,  data or information directed to the Licensed Products or Licensed
Patents which is disclosed to CLI or its Affiliates by MMTC; provided,  however,
the foregoing  obligations or confidentiality and non-use shall not apply to the
extent that such know-how, data and information is:

         ( i )    already known to  CLI at the  time of  disclosure hereunder or
                  hereafter  developed  by  CLI  independent  of  any disclosure
                  hereunder as CLI can demonstrate by competent proof; or


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         ( ii )   publicly known  prior to or  after disclosure  hereunder other
                  than through acts  or omissions of CLI, its Affiliates, or its
                  Affiliates employees; or

         ( iii )  disclosed  in good  faith to  CLI by  a third  party  under  a
                  reasonable claim of right; or

         ( iv )   disclosed to  third  parties under  a secrecy  agreement  with
                  essentially  the   same  confidentiality provisions   provided
                  herein for use solely in connection with CLI's exercise of its
                  rights under this Agreement.

Disclosure may be made by CLI to governmental agencies to the extent required or
desirable to secure governmental approval for marketing of Licensed Products and
to preclinical and clinical investigators where necessary or desirable for their
information  to the extent normal and usual in the custom of the trade and under
a secrecy agreement with  confidentiality  provisions which are similar to those
contained herein.  Nothing herein shall be deemed to limit the right of clinical
investigators from publishing the results of their work.

                       SECTION 6 - REDUCTION OF ROYALTIES


         6.1 Royalties  payable by CLI to MMTC under Section 3.3 hereof shall be
reduced as follows:

         ( i )    If CLI or its Affiliates  or sublicensees reasonably determine
                  in good faith with  respect  to  any  Patent  Country that, in
                  order  to  avoid  infringement  of  any  patent  not  licensed
                  hereunder, it is  reasonably  necessary  to  obtain  a license
                  regarding  Licensed  Products  under  any  patent not licensed
                  hereunder in  order to  make, use or sell Licensed Products in
                  such country  and to  pay a  royalty under  such  license, CLI
                  shall  notify  MMTC,  and  CLI's  obligations to pay royalties
                  under  Section 3.3 hereof shall be reduced with respect to Net
                  Sales in  such  Patent Country  by an  amount  equal  to fifty
                  percent  (50%)  of  the  royalty payable  by  CLI  under  such
                  additional  license.  CLI  shall, however,  make  a good faith
                  attempt  to  negotiate  the  royalty   rate  and   calculation

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                  of  royalties  payable  to such third  parties  with a view to
                  minimizing  the  royalty to be deducted under this Section 6.1
                  (i).

         ( ii )   If a  third  party  obtains, by order, decree or grant  from a
                  competent  governmental  authority  in  any  Patent Country, a
                  compulsory license under the Licensed Patents authorizing such
                  third party  to  manufacture, use or sell any Licensed Product
                  in such country, MMTC shall give prompt notice to CLI.  During
                  the period of time sales are made  pursuant to such compulsory
                  license, CLI's obligations to pay royalties  under Section 3.3
                  hereof with respect to sales in such country shall be  reduced
                  to the rate payable to MMTC by said third party.


                          SECTION 7 - COMMERCIALIZATION

         7.1 Subject to the  provisions  of Sections  3.3. and 3.4, CLI will use
reasonable  efforts to market  Licensed  Products in such  countries  where such
marketing  will  be  commercially  reasonable  to CLI  under  the  circumstances
pertaining from time to time. Notwithstanding the foregoing , but subject to the
provisions of Section 3.3 and 3.4,  nothing in this Agreement  shall require CLI
to maximize  sales of Licensed  Products  nor prevent  CLI,  its  Affiliates  or
sublicensees  from  manufacturing,  using or selling in any country any products
similar to or  competitive  with the  Licensed  Products.  MMTC also agrees that
nothing in this Agreement  shall in any way limit CLI's sole and exclusive right
to  determine,   in  its   discretion,   the  timing  or  manner  of  marketing,
manufacturing  or  advertising  Licensed  Products,   provided  such  marketing,
manufacturing,  or  advertising  is  in  compliance  with  applicable  laws  and
regulations.

                               SECTION 8 - PATENTS

         8.1 MMTC and CLI  shall  cooperate  in  connection  with the  continued
prosecution  by MMTC of the patent  applications  listed on  Appendix  I. If CLI
desires that MMTC file any application for a patent in specific  countries other
than  those  enumerated  on  Appendix  I  or  file  any  patent  application  on
improvements  and variations upon inventions  disclosed in the Licensed  Patents
for use in the Field,  CLI shall advise MMTC of such countries or  improvements,
variations  or  inventions,  as the  case  may be.  Provided  that  MMTC  has no


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reasonable  objection thereto,  MMTC shall thereupon file patent applications as
requested.  So long as this Agreement is in effect, CLI shall pay the reasonable
expenses  incurred after the date of this Agreement , including  reasonable fees
for patent counsel, for filing and prosecuting the patent applications listed on
Appendix I and such other patent application filing requested by CLI pursuant to
this Section 8.1. In addition,  MMTC shall take all necessary  steps and pay all
expenses  necessary to maintain for the full life thereof all Licensed  Patents,
and,  so long as this  Agreement  is in  effect,  CLI shall  reimburse  MMTC its
reasonable  expenses in connection  therewith.  MMTC agrees to sign such further
authorizations  and instruments and take such further action as may be requested
by CLI to implement  the  foregoing.  In  connection  with any patent filing and
prosecution  pursuant to this Section 8.1, the  cooperation  between the parties
shall include, without limitation:

         ( i )    CLI  having  full  access  to  all  documentation, filings and
                  communications  to or from  the respective patent offices, and
                  shall be  kept fully  advised as to  the status of all pending
                  applications;

         ( ii )   MMTC and its agents and attorneys consulting with CLI prior to
                  taking  any action  or making  any  filing  or  submission  in
                  connection with such patent prosecutions; and

         ( iii )  MMTC   and   its    agents   and    attorneys    giving    due
                  consideration to all suggestions and comments of CLI regarding
                  any aspect of such patent prosecutions.

         8.2 If any claim  relating  to  Licensed  Patents  becomes,  within any
Patent  Country,  the  subject of a  judgment,  decree or  decision  of a court,
tribunal,  or other  authority  of  competent  jurisdiction  , which  judgement,
decree, or decision is or becomes final (there being no further right of review)
and  adjudicates  the validity,  enforceability,  scope,  or infringement of the
same, the construction of such claim in such judgment,  decree or decision shall
be  followed  thereafter  in such  country in  determining  whether a product is
licensed hereunder, not only as to such claim but also as to all other claims to
which such construction reasonably applies. If at any time there are two or more
conflicting  final  judgments,  decrees,  or decisions  with respect to the same
claim, the decision of the higher tribunal shall thereafter control,  but if the
tribunal be of equal rank,  then the final  judgment,  decree,  or decision more
favorable  to such claim  shall  control  unless and until the  majority of such
tribunals of

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equal rank adopt or follow a less favorable final judgment, decree, or decision,
in which event the latter shall control.

         8.3 In the event any  infringement  action shall be brought  within any
Patent Country against CLI or any of its Affiliates or  sublicensees  because of
the  manufacture,  use or sale of Licensed  Products,  CLI shall promptly notify
MMTC  thereof.  CLI  shall  continue  to  pay  royalties  hereunder  during  the
continuance of such infringement  action and all appeals thereof,  provided that
CLI or MMTC shall defend such  action.  If neither CLI nor MMTC shall assume the
defense of such  infringement  action,  upon request by CLI to MMTC, then during
the pendency of such  infringement  action,  CLI's  obligations to pay royalties
under Section 3.3 with respect to sales in such country shall cease.

         8.4 If any third party shall, in the reasonable  opinion of CLI, within
any Patent  Country,  infringe any of the Licensed  Patents,  CLI shall promptly
notify  MMTC.  CLI shall have the right to bring suit and to take  action in its
own name or in the name of MMTC  where  necessary.  CLI and MMTC  shall,  at the
other's  request,  take all action  necessary to assist in such suits (including
joining as a party). If MMTC is required or requested by CLI to join in any suit
brought by CLI,  MMTC may be  represented  at CLI's expense by counsel of MMTC's
choice,  provided that the expense is reasonable and the hourly rates charged by
MMTC's counsel are not greater than those of CLI's counsel on the same suit. Any
monetary recovery in connection with such  infringement  action shall be applied
to reimburse MMTC and CLI for their out-of-pocket expenses (including reasonable
attorneys'  fees and any amounts paid  hereunder by CLI to MMTC for employees or
counsel  fees) in  prosecuting  such  infringement.  Any balance shall be shared
equally  between CLI and MMTC. If such  recovery is less than the  out-of-pocket
expenses,  reimbursement shall be on a pro-rated basis. CLI's obligations to pay
royalties  to MMTC  pursuant  to  Sections  3.3 and 3.4 shall not be  reduced or
diminished because of the pendency of any infringement action.

         8.5 MMTC will cooperate with CLI in the defense of any suit,  action or
proceeding   against  CLI  alleging  the  infringement  of  a  patent  or  other
intellectual  property  right owned by a third party by reason of the use by CLI
of the Licensed Patents in the manufacture, use or sale of the Licensed Products
or in the exercise of any other right  granted  hereunder to CLI. CLI shall give
MMTC prompt notice of the commencement of any such suit, action or proceeding or
claim of infringement.

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MMTC shall give to CLI all authority  (including the right to exclusive  control
of the defense of any such suit, action or proceeding and the exclusive right to
compromise,  litigate,  settle  or  otherwise  dispose  of any  suit,  action or
proceeding),  information and assistance  necessary to defend or settle any such
suit,  action or proceeding.  CLI may join MMTC as a defendant,  if necessary or
desirable,  and MMTC shall  execute all  documents  and take all other  actions,
including giving testimony,  which may be reasonably required in connection with
the defense of such suit, action or proceeding. CLI agrees to reimburse MMTC for
any costs and  expenses to the extent such costs and  expenses  are  approved in
advance by CLI.

         8.6 CLI shall mark all Licensed  Products made,  used or sold under the
terms of this Agreement, or their containers, in accordance with the patent laws
of the country where made, used or sold.

         8.7  Anything  to  the  contrary  notwithstanding  in  this  Section  8
(including use of the word  "reimburse") , CLI shall pay MMTC in advance for all
costs and expenses,  other than legal fees and expenses,  which will be incurred
by MMTC in connection  with Section 8. With respect to  reimbursement  by CLI of
legal fees and  expenses  incurred by MMTC  pursuant to Section 8, CLI shall pay
such legal fees and expenses  directly to MMTC's  legal  counsel  promptly  upon
MMTC's  submission  to CLI of bills for such  legal fees and  expenses  and MMTC
shall not be required to first pay such legal fees and expenses in order to seek
reimbursement from CLI.

                    SECTION 9 - REPRESENTATION AND WARRANTIES

         9.1  MMTC hereby represents and warrants to CLI as follows:

         ( i )    MMTC has the corporate  power and  authority  to  execute  and
                  deliver   this   Agreement  and  to  perform  its  obligations
                  hereunder, and the execution, delivery and performance of this
                  Agreement by MMTC have been duly  and validly  authorized  and
                  approved  by proper corporate action on the  part of MMTC  and
                  MMTC  has  taken  all  other  action  required  by  law,   its
                  corporate statutes, certificate of incorporation or by-laws or
                  any  agreement  to  which it  is a party or to which it may be
                  subject required  to  authorize such  execution,  delivery and
                  performance.   Assuming   due   authorization,  execution  and
                  delivery on the  part of CLI,  this  Agreement  constitutes  a
                  legal,  valid  and  binding  obligation  of  MMTC  enforceable

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                  against  MMTC  in  accordance  with its terms, except  as  the
                  enforceability    thereof   may   be   limited  by  applicable
                  bankruptcy,  insolvency, reorganization  or other similar laws
                  of general  application  relating to  creditors' rights.

         ( ii )   To the best of MMTC's knowledge, the execution and delivery of
                  this  Agreement  by  MMTC   and   the   performance   by  MMTC
                  contemplated  hereunder  will  not violate any ordinance, law,
                  decree  or  government regulation or any order of any court or
                  other   governmental   department,   authority,   agency    or
                  instrumentality thereof.

         ( iii)   Except as set forth in that certain letter dated May 14, 1992,
                  from   MMTC  to  CLI,  a  copy  of which is attached hereto as
                  Appendix II, to the best of MMTC's   knowledge, as of the date
                  hereof, the issued  Licensed Patents are valid and enforceable
                  patents  and  MMTC  has  no  knowledge that any third party is
                  infringing such Licensed Patents or  that the manufacture, use
                  and sale by CLI of  Licensed Products  will infringe any other
                  patents of MMTC or its Affiliates or patents of third parties.
                  Appendix I  lists all  patents and patent applications related
                  to  the  Licensed  Product  beneficially  owned by MMTC or its
                  Affiliates. In  addition , MMTC is the  legal  and  beneficial
                  owner of  all of  the Licensed  Patents, and  no other person,
                  firm, corporation or other  entity, has any right, interest or
                  claim in or to the Licensed Patents.

         ( iv )   Neither the  execution and  delivery of this Agreement nor the
                  performance  hereof  by  MMTC  requires  MMTC  to  obtain  any
                  permits, authorizations or consents from any governmental body
                  or from  any  other  person,  firm  or  corporation,  and such
                  execution,  delivery  and  performance  will not result in the
                  breach of or give rise to any  termination of any agreement or
                  contract  to  which  MMTC  may  be a party  or which otherwise
                  relates to the Licensed Patents or the Licensed Products.

         ( v )    Upon  execution  of  this  Agreement,  MMTC  will  disclose to
                  technical  personnel of CLI all data and material information,
                  known to it or its  Affiliates, with respect to the safety and
                  efficacy of the Licensed Products.

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         9.2  CLI hereby represents and warrants to MMTC as follows:

         ( i )    CLI has the  corporate power  and  authority  to  execute  and
                  deliver   this   Agreement  and  to  perform  its  obligations
                  hereunder, and the execution, delivery and performance of this
                  Agreement  by  CLI  have  been  duly  and  validly  authorized
                  and approved by proper corporate action on the part of CLI and
                  . and CLI  has  taken  all other  action required  by law, its
                  certificate of  incorporation  or by-laws or  any agreement to
                  which it is a party or to which it may be  subject required to
                  authorize    such   execution  and  delivery.   Assuming   due
                  authorization,  execution  and  delivery  on the part of MMTC,
                  this  Agreement  constitutes  a  legal,   valid   and  binding
                  obligation of CLI, enforceable against CLI in  accordance with
                  its terms, except as the enforceability thereof may be limited
                  by applicable  bankruptcy, insolvency, reorganization or other
                  similar laws of  general  application  relating  to creditors'
                  rights.

         ( ii )   To the best of CLI's  knowledge, the execution and delivery of
                  this  Agreement  and  the  performance  by  CLI   contemplated
                  hereunder will not violate any state, federal or other statute
                  or regulation or any order  of any court or other governmental
                  department, authority, agency or instrumentality of the United
                  States.

         (ii) CLI shall purchase product  liability that is satisfactory to MMTC
in the amount of not less than $5,000,000 for product liability.

                          SECTION 10 - INDEMNIFICATION

         10.1 CLI agrees to indemnify and hold MMTC,  its  directors,  officers,
agents and employees harmless from all loss, damage,  liability,  claim of loss,
lawsuit,  action, cost, fees (including  reasonable attorneys' fees) , expenses,
and other claims  asserted  against them or any of them for damage,  injury,  or
death  arising  directly or  indirectly  as a result of the clinical  testing or
use,, manufacturing,  processing,  packaging, marketing, sale or distribution of
Licensed  Products,  in each case by CLI, its  Affiliates or  sublicensees.  CLI
shall have no obligation to indemnify MMTC or its directors, officers, agents or
employees  under this Section 10.1 in the event a judge or jury makes a specific
finding or verdict,  which is sustained through final appeal of gross negligence
that is willful or wanton or of intentional and conscious wrongdoing.

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MMTC shall give CLI  notice as soon as  practicable  of any such claim or action
and CLI shall have the right to  participate  in any  compromise,  settlement or
defense thereof.

                                SECTION 11 - TERM

         11.1 This Agreement  shall commence as of the effective date hereof and
shall  continue in  perpetuity  unless  terminated  earlier in  accordance  with
Section 12.

         11.2 The term of CLI's  royalty  obligations  under Section 3.3 of this
Agreement  shall be for the life of any  patent  included  within  the  Licensed
Patents and licensed to CLI pursuant to Section 2.1.

         11.3 CLI's obligation to pay royalties pursuant to Sections 3.3 and 3.4
hereof shall cease and CLI shall be deemed to have a fully paid-up  license upon
the earlier of ( i ) the expiration of all patents  within the Licensed  Patents
or ( ii ) respecting  the Patent  Country or Patent  Countries in question,  the
termination of CLI's obligation to pay royalties pursuant to Section 8.

                            SECTION 12 - TERMINATION

         12.1 If at any time CLI shall,  in its reasonable  judgment,  determine
that it is not  reasonably  practicable  to sell or  continue  to sell  Licensed
Products, CLI, upon sixty (60) days notice to MMTC, shall have the right, as CLI
may elect, to terminate this Agreement, whereupon this Agreement shall terminate
sixty (60) days after the date of such notice.


         12.2 If CLI  fails to pay  MMTC any  required  Additional  License  Fee
required  by Section 3.2 hereof,  royalties  required by Section 3.3 hereof,  or
minimum  annual  royalties  required by Section  3.4 hereof,  and such breach or
default as not cured within  thirty (30) days after the giving of notice by MMTC
specifying  such breach or default,  MMTC shall have the right to terminate this
Agreement  immediately  upon  expiration  of such  thirty (30) day period and to
institute arbitration  proceedings to recover any unpaid royalties accrued on or
before termination.


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<PAGE>


         12.3 Subject to the  provisions  of Section 12.2, if either CLI or MMTC
breaches or defaults in the  performance  or observance of any of the provisions
of this  Agreement  and such breach of default is not cured  within  ninety (90)
days after the giving of notice by the other  party  specifying  such  breach or
default, the other party shall have the right to terminate this Agreement upon a
further thirty (30) days notice. If any  representation or warranty of any party
as contained in this Agreement shall be materially incorrect or inaccurate, such
shall be deemed to be a material  breach or default  of this  Agreement  by such
party.

         12.4   Termination  of  this  Agreement for any reason shall be without
prejudice to:

         ( i )    the rights  and  obligations  of the  parties  as  provided in
                  Sections 5.1, 5.2 and 10.1 hereof;

         ( ii )   MMTC's right to  receive all  payments accrued  under Sections
                  3.3 and  3.4  hereof  prior  to  the  effective  date  of such
                  termination; and

         ( iii )  any other remedies which either party may otherwise have.

         12.5  Upon  any  termination  by CLI  under  Section  12.1  hereof,  or
termination by MMTC under Section 12.2 or 12.3 hereof, all rights granted to CLI
pursuant to this Agreement shall terminate.


         12.6 CLI  shal   raise  $5,000,000  in funds by March 31, 1997.  If CLI
does not secure the $5,000,000 in funds by said date,  MMTC shall at its option,
terminate  this  agreement  and shall be  allowed  to  retain  any and all funds
received by MMTC from CLI.

                  SECTION 13 - DISPOSITION OF LICENSED PRODUCTS

         13.1 Upon  termination  of this  Agreement  in its  entirety  by either
party, CLI shall provide MMTC with a written  inventory of all Licensed Products
in the process of  manufacture  or in stock and shall  dispose of such  Licensed
Products within a period of one (1) year following such  termination;  provided,
however,  that all such Licensed  Products shall be subject to the terms of this
Agreement.

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<PAGE>


                           SECTION 14 - FORCE MAJEURE


         14.1 No party  shall be liable for  failure  of or delay in  performing
obligations set forth in this Agreement,  and no party shall be deemed in breach
of its obligations,  if such failure or delay is due to natural disasters or any
causes reasonably beyond the control of such party.



                      SECTION 15 - ASSIGNMENT / SUBLICENSE

         15.1 This  Agreement  is binding upon and shall inure to the benefit of
MMTC and its legal  representatives,  successors and assigns.  Any sublicense by
CLI shall not operate to relieve CLI of any  obligations  or  liabilities  under
this  Agreement,  including,  without  limitation,  the obligation of CLI to pay
license fees and royalties  under Section 3. This Agreement  shall not otherwise
be assignable by MMTC or CLI or sublicensed by CLI except with the prior written
consent of the respective  other party,  which consent shall not be unreasonably
withheld; provided, however, that either party shall have the right to:

         ( i )    Assign its rights and  obligations under this Agreement to any
                  successor (including the surviving entity in any consolidation
                  or merger)  to all  or  substantially  all  of  its  business,
                  provided,  that  such  successor  assumes  all of such party's
                  obligations under this Agreement; or

         ( ii )   Transfer its interest or any part thereof under this Agreement
                  to any  Affiliate,  or  designate  and  cause any Affiliate to
                  perform all or part of its obligations under this Agreement or
                  to have the benefit of all or part of its rights hereunder. In
                  the event of any such transfer, the transferee Affiliate shall
                  assume and be bound by the provisions of this  Agreement,  and
                  its performance under this  Agreement  shall  be guaranteed by
                  the transferring party.

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<PAGE>

                           SECTION 16 - MISCELLANEOUS

         16.1 Governing Law and  Arbitration - This Agreement  shall be governed
by and  construed  under the laws of the State of New  York,  regardless  of the
choice  of law  principles  of New York or any  other  jurisdiction.  Except  as
otherwise provided in Sections 4.3 hereof, any claim or controversy  arising out
of or  relating  to this  Agreement  shall  be  settled  by  final  and  binding
arbitration by three (3) arbitrators, in accordance with the then-existing rules
of the American Arbitration  Association,  and judgement upon the award rendered
by the arbitrators may be entered in any court having jurisdiction  thereof. The
parties shall each select one  arbitrator  and the  arbitrators  selected by the
parties shall mutually agree on a third  arbitrator.  Such arbitration  shall be
held in New York, New York.

         16.2 Entire  Agreement- This agreement sets forth the entire  agreement
and  understanding  among the parties hereto as to the subject matter hereof and
has priority over all documents,  verbal consents or  understandings  made among
MMTC and CLI and their  respective  Affiliates  before  the  conclusion  of this
Agreement with respect to the subject  matter hereof;  none of the terms of this
Agreement  shall be amended or modified  except in writing signed by the parties
hereto.

         16.3  Waivers - A waiver by any party of any term or  condition of this
Agreement in any one instance shall not be deemed or construed to be a waiver of
such  term or  condition  for  any  similar  instance  in the  future  or of any
subsequent breach hereof. All rights,  remedies,  undertakings,  obligations and
agreements  contained in this  Agreement  shall be  cumulative  and none of them
shall be a limitation of any other  remedy,  right,  undertaking,  obligation or
agreement of any party.

         16.4 Public  Statements - Neither party shall make any public statement
or make any press release expressly or implicitly  identifying this Agreement or
the other party  without  first  obtaining the consent of the other party (which
consent shall not be  unreasonably  withheld) , except that consent of the other
party shall not be required as to any public statement or other

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<PAGE>


communication ( i ) which is reasonably believed to be required by law, or  (ii)
which has already been publicly disclosed and is still accurate.

         16.5  Severability  - If and solely to the extent that any provision of
this Agreement  shall be invalid or  unenforceable,  or shall render this entire
Agreement to be unenforceable or invalid, such offering provision shall be of no
effect and shall not effect the validity of the  remainder of this  Agreement or
any of its provisions; provided, however, the parties shall use their respective
reasonable  efforts to renegotiate  the offending  provisions to best accomplish
the original intentions of the parties.



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<PAGE>






         IN WITNESS WHEREOF, the parties hereto have caused this Agreement to be
executed as of the date first written above by their duly authorized officers.

                                                     MMTC, INC.
                                       By:/s/___________________________
                                      Its:___________________________

                                     Dated:__________________________

                                                     CHEUNG LABORATORIES, INC.


                                       By:/s/___________________________
                                      Its:___________________________

                                     Dated:__________________________

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<PAGE>






                                   Appendix I
                                Licensed Patents




1.       Patents

                         Patent         Issue
         Country         Number          Date         Title

         U.S.          5, 007, 937   April 16, 1991  Catheters for Treating
                                                     Prostate Disease

2.       Applications

                             Application        Filing
         Country               Number            Date              Title

         European Countries   PCT/0591/02509  April 12, 1991  Catheters for
         Canada                                               Treating  Prostate
         Japan                                                Disease
       

3.       All  other  patents  and  applications  in any  country,  now  owned or
         hereafter  acquired  by MMTC,  based on or related to the  patents  and
         patent applications listed in paragraph 1 of this Appendix I.

4.       All  divisionals,  continuations,  continuations-in-part,  patents   of
         addition, extensions and reissues of any patents or applications within
         the foregoing paragraphs 1 and 2 of this Appendix I.


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