1

      Portions of Exhibit 10.5 have been redacted and are the subject of a
confidential treatment request filed with the Secretary of the Securities and
Exchange Commission.
   2

                                  May 31, 1999

                            OSI PHARMACEUTICALS, INC.

                                       and

                               NOVARTIS PHARMA AG

                   AMENDMENT NO. 2 TO COLLABORATIVE AGREEMENT
   3

                                 Amendment No. 2

      THIS AMENDMENT is made as of the 31st day of May, 1999 between NOVARTIS
PHARMA AG, successor-in-interest to the pharmaceutical business of CIBA-GEIGY
LIMITED, of Lichtstrasse 35, CH-4002 Basel, Switzerland (hereinafter referred to
as "NOVARTIS") and OSI PHARMACEUTICALS, INC., formerly known as ONCOGENE
SCIENCE, INC., of 106 Charles Lindbergh Boulevard, Uniondale, New York
11553-3649, USA (hereinafter referred to as "OSI").

      WHEREAS, NOVARTIS and OSI are partners in a Collaborative Agreement dated
as of April 19, 1995 (the "1995 Agreement"), pursuant to which OSI granted to
NOVARTIS an exclusive license with the right to grant sublicenses to
manufacture, have manufactured, use and sell products containing the Compound
(as defined in Clause 1.3 of the 1995 Agreement) for the Licensed Indications
(as defined in Clause 1.5 of the 1995 Agreement) (all capitalized items used
herein but not defined shall have the meanings described thereto in the 1995
Agreement); and

      WHEREAS, pursuant to the 1995 Agreement, OSI also granted to NOVARTIS an
option to acquire from OSI a license to manufacture, use and sell products
containing TGF-(beta)3 and other TGF-(beta)s for all other indications not now
included in the Licensed Indications; and

      WHEREAS, the four year time limit to exercise the option was extended
until May 31, 1999 by an amendment to the 1995 Agreement ("Amendment 1") dated
April 13, 1999; and

      WHEREAS, OSI and NOVARTIS hereby wish to amend certain terms of the 1995
Agreement.

      NOW, THEREFORE, IT IS HEREBY AGREED AS FOLLOWS:

1. References. All references in the 1995 Agreement to "CIBA-GEIGY" or "CG"
shall be deemed to be references to "NOVARTIS". All references in the 1995
Agreement to "ONCOGENE SCIENCE" shall be deemed to be references to "OSI".

2. Recitals. The recital (F) in the 1995 Agreement shall be deleted in its
entirety and replaced with the following:

      "NOVARTIS also wishes to have the opportunity to acquire from OSI a
      license to manufacture, use and sell products containing TGF-(beta)3 and
      other TGF-(beta)s for certain other indications not now included in the
      Licensed Indications".
   4

3. Definitions.

      (a) Section 1.5 of the 1995 Agreement shall be deleted in its entirety and
replaced with the following:

            "1.5  "Licensed Indications" shall mean: (i) bone, cartilage and
                  tendon repair, and (ii) additional indications deemed to be
                  included in the Licensed Indications pursuant to Clause 5.7
                  and Clause 5.8, as amended."

      (b) Section 1.7 of the 1995 Agreement shall be amended so that the
language immediately following subsection (v) shall be as follows:

                  "all to the extent actually allowed, accrued or taken, and as
                  determined in accordance with the standard accounting
                  procedures of the party (i.e., NOVARTIS or OSI) making the Net
                  Sales."

      (c) Section 1.11 of the 1995 Agreement shall be amended as follows:

            "1.11 "Products" shall mean pharmaceutical preparations containing
                  the Compound designed for administration to human beings and
                  animals which fall within the scope of the claims of the OSI
                  Patents."

4. Supply of TGF-(beta)s.

      (a) The second sentence of Section 3.3(d) of the 1995 Agreement shall be
deleted and replaced with the following:

          "3.3(d) It is understood that NOVARTIS (i) shall not be obliged to
                  scale up its manufacturing process solely to meet the
                  requirements of OSI and OSI's licensees for research and
                  development purposes and clinical trials, and (ii) shall only
                  be obliged to supply Compound to OSI and OSI's licensees for
                  such purposes as long as it has sufficient Compound for its
                  own consumption. Provided NOVARTIS decides to initiate full
                  development of a Product in the Licensed Indications, it is
                  the intention of NOVARTIS to scale up such process to meet its
                  estimated future requirements. NOVARTIS will use commercially
                  reasonable efforts in designing its processing capacity so
                  that it is adequate to also meet all of OSI's requirements and
                  that of OSI's licensees for commercial quantities of the
                  Compound foreseen at the time of such scale up. If such
                  processing capacity proves to be adequate, NOVARTIS shall use
                  reasonable efforts to also supply OSI and the licensees of
                  OSI."

      (b) The third sentence of Section 3.3(d) of the 1995 Agreement shall be
deleted and replaced with the following:
   5

          "3.3(d) Should NOVARTIS fail to do so, or if processing capacity
                  should prove to be inadequate to meet all OSI actual
                  requirements and NOVARTIS should be unwilling to invest in
                  additional capacity, or if NOVARTIS decides not to initiate
                  full development of a Product, it agrees if so requested to
                  grant a license to OSI under the NOVARTIS Patents and NOVARTIS
                  Know-How to produce the Compound on terms to be negotiated in
                  good faith, the financial terms to be reasonable having regard
                  to the cost of supplies of the Compound as at the date of the
                  license negotiations, the cost to OSI of procuring the grant
                  of licenses for any parts of the process covered by Third
                  Party Patents, and the estimated production costs of OSI."

      (c) At the end of Section 3.3(e) of the 1995 Agreement the following
language shall be added:

          "3.3(e) The parties furthermore agree that in case NOVARTIS decides
                  not to continue the development of the Compound in the
                  Licensed Indications NOVARTIS shall, upon the request of OSI,
                  make available its remaining stock of Compound in accordance
                  with the arrangements hereinafter, whereupon NOVARTIS shall no
                  longer be required to produce further Compound for supply to
                  OSI and OSI's licensees."

      (d) The second sentence of Section 3.3(f) of the 1995 Agreement shall be
deleted and replaced with the following:

          "3.3(f) Except during the 36-month notification periods or in case of
                  the discontinuance of the development of the Compound in the
                  Licensed Indications as set forth in Sections 3.3(b) and
                  3.3(e), NOVARTIS shall, in the event that it is unable to
                  supply the Compound to OSI for a period of 90 days by reason
                  of force majeure or otherwise, use commercially reasonable
                  endeavours to have an alternative plant for the production of
                  the Compound validated within one year from the date of
                  cessation of supply."

5. Development.

      (a) Section 4.1 of the 1995 Agreement (including subsections 4.1.1, 4.1.2,
4.1.3 and 4.1.4) shall be deleted in its entirety and replaced with the
following:

            "4.1  NOVARTIS shall be solely responsible, at its own expense, for
                  the development of the Products for the Licensed Indications.
                  NOVARTIS shall use reasonable diligence to take all steps
                  necessary for the development of such Products."
   6

      (b) The following language shall be added after Section 4.3 of the 1995
Agreement, Section 4.3 then becoming Section 4.3.1:

            4.3.2 NOVARTIS hereby acknowledges and notifies OSI that as of May
                  31, 1999 (the "Discontinuance Date"), NOVARTIS has
                  discontinued development of Products for the indications of
                  oral mucositis and healing of soft tissue wound, including
                  prevention of scarring and fibrosis (such indications being
                  hereinafter referred to as the "Discontinued Indications").
                  NOVARTIS and OSI agree that all licenses heretofore granted to
                  NOVARTIS with respect to the Discontinued Indications are
                  terminated. With respect to the Discontinued Indications, upon
                  and following the Discontinuance Date, NOVARTIS shall make
                  available to OSI, as more specifically described below, for
                  use by OSI and its licensees, the results of development work
                  carried out up to the Discontinuance Date, including, without
                  limitation, access to NOVARTIS' Investigational New Drug
                  ("IND") filing made with the United States Food and Drug
                  Administration and any equivalent filings made in countries
                  other than the United States. It is understood that results
                  relating to formulation of the Compound and analytical methods
                  developed by NOVARTIS up to the Discontinuance Date shall be
                  excluded from such transfer. NOVARTIS shall make a good faith
                  effort to make available the results of NOVARTIS' development
                  work by delivery of all written materials to OSI within 45
                  days following the Discontinuance Date and by meeting for one
                  day with representatives of OSI and OSI's licensees at a place
                  and on a date mutually convenient within 45 days following the
                  receipt by NOVARTIS of an agenda of outstanding issues
                  necessary for OSI and/or OSI's licensees to continue work in
                  the Discontinued Indication. NOVARTIS hereby acknowledges and
                  agrees that OSI and/or OSI's licensees may use any of the
                  foregoing results for the purpose of continuing development
                  for indications other than the Licensed Indications subject to
                  the following terms and conditions:

                  (a) with respect to development and sales of a Product for
                  oral mucositis by OSI or a licensee of OSI, OSI shall pay to
                  NOVARTIS (i) ** of any Net Sales made directly by OSI, and/or
                  (ii) ** of any revenue received by OSI from its licensee(s)
                  including, without limitation, revenue generated by licensing
                  fees, milestone payments or royalties;

- ----------

**    This portion has been redacted pursuant to a request for confidential
      treatment.
   7

                  (b) with respect to development and sales of a Product for any
                  indications other than oral mucositis or other than any
                  indication included within the Licensed Indications, OSI shall
                  pay to NOVARTIS (i) ** of any Net Sales made directly by OSI,
                  and/or (ii) ** of any revenue received by OSI from its
                  licensee(s), including, without limitation, revenue generated
                  by licensing fees, milestone payments or royalties; and

                  (c) with respect to any indications other than oral mucositis
                  or other than any indication included within the Licensed
                  Indications, if OSI or its licensee(s) completes Phase II
                  clinical trials with respect to a Product and, at such point,
                  seeks a licensee to complete development of the Product and to
                  commercialize the Product, OSI hereby grants to NOVARTIS a
                  right of first negotiation with respect to such a license. OSI
                  and NOVARTIS shall negotiate such a license in good faith
                  taking into consideration the contributions of the parties up
                  to the Discontinuance Date. If the parties fail to enter into
                  such a license, OSI or its licensee may enter into such a
                  license with a third party, provided that OSI or its licensee
                  may not offer more favorable terms to a third party without
                  first offering such favorable terms to NOVARTIS.

                  (d) For the purpose of calculating the royalties Sections 5.2
                  and 5.3 shall be applicable and Sections 5.4, 5.5 and 5.6
                  shall apply to all payments made by OSI hereunder."

      (c) Section 4.5 of the 1995 Agreement shall be deleted in its entirety.

6. Payment of Royalties and for Rights Granted.

      (a) Section 5.2 of the 1995 Agreement shall be deleted in its entirety and
replaced with the following:

            "5.2  NOVARTIS agrees to pay OSI a royalty of ** of Net Sales of the
                  Products in the Licensed Indications made by NOVARTIS or its
                  sub-licensees during the royalty period. OSI agrees to pay
                  NOVARTIS a royalty of ** of Net Sales made directly by OSI of
                  the Products outside the Licensed Indications in accordance
                  with Section 4.3.2 during the royalty period. The royalty
                  period shall be calculated on a country-by-country basis and
                  shall commence on the date of the commercial launch of any of
                  the Products either by NOVARTIS and/or OSI, as applicable, and
                  shall end on the date of expiry of the Patents in the
                  country."

- ----------
**    This portion has been redacted pursuant to a request for confidential
      treatment.
   8

      (b) Section 5.3 of the 1995 Agreement shall be deleted in its entirety and
replaced with the following:

            "5.3  If OSI shall not have applied for any Patent in a particular
                  country or if patent protection for a Product sold either by
                  NOVARTIS and/or OSI, as applicable, is refused or revoked, the
                  rate of royalty payable on Net Sales in that country shall be
                  reduced **. Royalties under this Section 5.3 shall be payable
                  for a period of ten years from the date of commercial launch
                  in the country in question."

      (c) Section 5.4 of the 1995 Agreement shall be deleted in its entirety and
replaced with the following:

            "5.4  No later than 60 days after the end of each Half Year NOVARTIS
                  and/or OSI shall deliver to the other party a statement
                  showing its and its (sub)licencees' Net Sales of Products
                  invoiced during such Half Year, and in the case of OSI also
                  any revenue from its licencee(s) and shall pay to the other
                  party the amount due on such Net Sales and/or revenue, as
                  applicable."

      (d) Section 5.5 of the 1995 Agreement shall be deleted in its entirety and
replaced with the following:

            "5.5  NOVARTIS and OSI shall keep accurate records in sufficient
                  detail to enable the amount of payments due hereunder to be
                  calculated and shall maintain such records for a period of two
                  Years after the end of the period to which they relate.
                  NOVARTIS and OSI shall be entitled to have such records
                  examined during normal working hours by an independent firm of
                  accountants to which the other party has no reasonable
                  objection so as to verify the correctness of any payment
                  PROVIDED HOWEVER that such firm of accountants shall only
                  report to the other party the correct amount of Net Sales and
                  the amount of royalty due and in the case of OSI any revenue
                  from licencee(s), and shall keep confidential all other
                  information acquired in the course of such examination."

- ----------
**    This portion has been redacted pursuant to a request for confidential
      treatment.
   9

      (e) Section 5.6 of the 1995 Agreement shall be deleted in its entirety and
replaced with the following:

            "5.6  (a) Royalties and any other payments due hereunder shall be
                  made in US Dollars into such accounts as shall be nominated by
                  the receiving party for that purpose. In the case of NOVARTIS
                  Net Sales in currencies other than in US Dollars, such Net
                  Sales shall first be calculated in the foreign currency, then
                  converted to Swiss Francs and then converted to US Dollars, in
                  each case using a ** exchange rate calculated on the basis of
                  NOVARTIS' ** average exchange rates. NOVARTIS' monthly average
                  exchange rates are currently calculated using the average of
                  Reuters Daily Rates between 09:14 a.m. and 10:00 a.m. on the
                  one hand and the official Frankfurt fixing of the German
                  National Bank rates in the afternoon on the other hand. In the
                  case of OSI Net Sales or revenue in currencies other than US
                  Dollars, royalties and any other payments shall first be
                  calculated in the foreign currency and then converted to US
                  Dollars, in each case using for ** calculation the foreign
                  currency exchange rate published in The Wall Street Journal on
                  the last day of the preceding month.

                  (b) If NOVARTIS or OSI are obliged to deduct withholding tax
                  on any payments to be made hereunder, the payment shall be
                  made net of withholding tax. NOVARTIS and OSI, as applicable,
                  will deliver to the other party receipts or other evidence of
                  payment issued by the relevant tax authorities to enable it to
                  claim any available double taxation relief."

      (f) The second sentence of Section 5.7 of the 1995 Agreement shall be
deleted in its entirety and replaced with the following:

            "5.7  NOVARTIS is hereby granted an exclusive option to include the
                  treatment of transplant patients (e.g. graft protection), the
                  treatment of ischemia (e.g., angina pectoris and peripheral
                  vascular disease), the treatment of stroke patients, and the
                  treatment of inflammatory bowel disease as additional
                  indications and a nonexclusive option to include any other
                  additional indications relating to the Compound (other than
                  the Discontinued Indications and Licensed Indications) upon
                  making the milestone payment or stock purchase set forth in
                  Section 5.8, as amended, such option to be exercised, if at
                  all, within sixty (60) days of the decision by NOVARTIS to
                  initiate full development of the Product (i.e., Phase IIB or
                  Phase III clinical trials for bone, cartilage or tendon
                  repair, which decision shall be communicated promptly to OSI
                  in writing) or by May 31, 2003, whichever is earlier."

- ----------

**    This portion has been redacted pursuant to a request for confidential
      treatment.
   10

      (g) Section 5.8 of the 1995 Agreement shall be deleted in its entirety and
replaced with the following:

            "5.8  Within sixty (60) days after the earlier of: (a) the date of
                  the decision by NOVARTIS to initiate full development (as
                  defined in Section 5.7) of a Product for bone, cartilage or
                  tendon repair, or (b) the exercise of the option set out in
                  Section 5.7, NOVARTIS agrees to either make a milestone
                  payment of ** in cash to OSI or to purchase ** of OSI common
                  stock at a per share price equal to ** of the average closing
                  price for the 30-day period ending on the date of purchase.
                  Upon making this milestone payment or completion of the stock
                  purchase, such additional indications relating to the Compound
                  shall be deemed to be included in the Licensed Indications.
                  The retention of the rights to such other indications shall be
                  subject to the provisions of the Stock Purchase Agreement."

7. Termination.

      Section 9.4 of the 1995 Agreement shall be deleted in its entirety and
replaced with the following:

            "9.4  Termination or expiry of this Agreement shall not affect the
                  rights of any party against the other party in respect of any
                  antecedent breach of the terms hereof, nor the rights or
                  obligations of any party pursuant to the provisions of Clauses
                  4 and 5 with regard to, in each instance, royalty obligations
                  in respect of the Net Sales and/or revenue from licensees up
                  to the date of termination or expiry, Clause 7 in respect of
                  confidentiality and Clause 10 in respect of indemnities."

8. Schedules.

      Schedules 1 and 2 of the 1995 Agreement shall be deleted in their entirety
and replaced with the Schedules attached hereto.

9. Miscellaneous.

      (a) Except as amended hereby, all terms and conditions of the 1995
Agreement shall remain in full force and effect.

- ----------
**    This portion has been redacted pursuant to a request for confidential
      treatment.
   11

      (b) This Amendment shall be construed and applied in accordance with the
laws of the State of New York.

      (c) This Amendment shall be binding upon and shall inure to the benefit of
the parties hereto and their respective legal representatives, successors and
permitted assigns.

      (d) This Amendment may be executed in two counterparts, each of which
shall be deemed an original, but all of which together shall constitute one and
the same instrument.
   12

      IN WITNESS WHEREOF, the parties hereto have caused this Amendment to be
executed as of the date first above written.


                                OSI PHARMACEUTICALS, INC.

                                By: /s/
                                    --------------------------------------------
                                    Colin Goddard, Ph.D.
                                    President & Chief Executive Officer


                                NOVARTIS PHARMA AG

                                By: /s/
                                    --------------------------------------------
                                    Gisela Schelling
                                    Legal Counsel
                                    Ivan Csendes, Ph.D.
                                    Head Licensing Drug-Delivery & Out-Licensing
                                    Business Development & Licensing
   13

                                   SCHEDULE 1

                        List of OSI Patents/Applications



Country               Application/Patent No.      Filing Date       Expiry Date
- -------               ----------------------      -----------       -----------
                                                           
Australia             600230                      21.04.1986        21.04.2002
Australia             620795                      19.10.1987        19.10.2003
Australia             668072                      17.05.1990        17.05.2006
Australia             659415                      25.06.1991        25.06.2007
Australia             657913                      25.06.1991        25.06.2007
Australia             51628/93                    21.09.1993        21.19.2009
Austria               E83152                      15.04.1986        15.04.2006
Austria               384494 (E)                  20.10.1987        20.10.2007
Austria               536275 (E)                  25.06.1991        25.06.2011
Belgium               200090 (E)                  15.04.1986        15.04.2006
Belgium               384494 (E)                  20.10.1987        20.10.2007
Belgium               536275 (E)                  25.06.1991        25.06.2011
Canada                1274471                     18.04.1986        18.04.2006
Canada                549582-2                    20.10.1987        20.10.2007
Canada                2084510                     25.06.1991        25.06.2011
Denmark               536275 (E)                  25.06.1991        25.06.2011
EPO                   200090 (E)                  15.04.1986        15.04.2006
EPO                   95109866.4                  20.10.1987        20.10.2007
EPO                   536275 (E)                  25.06.1991        25.06.2011
France                200090 (E)                  15.04.1986        15.04.2006
France                384494 (E)                  20.10.1987        20.10.2007
France                536275 (E)                  25.06.1991        25.06.2011
Germany               P3637241.5-08               15.04.1986        15.04.2006
Germany               384494 (E)                  20.10.1987        20.10.2007
Germany               536275 (E)                  25.06.1991        25.06.2011
Greece                384494 (E)                  20.10.1987        20.10.2007
Greece                536275 (E)                  25.06.1991        25.06.2011
Ireland               60059                       14.04.1986        14.04.2006
Ireland               2809/87                     19.10.1987        19.10.2007
Israel                78546                       20.04.1986        20.04.2006
Israel                84211                       19.10.1987        19.10.2007
Israel (Div.)         103617                      20.04.1986        20.04.2006
Italy                 20732BE/93                  15.04.1986        15.04.2006
Italy                 384494 (E)                  20.10.1987        20.10.2007
Italy                 536275 (E)                  25.06.1991        25.06.2011
Japan                 2065324                     18.04.1986
Japan                 265201/87                   20.10.1987
Japan                 513051/91                   25.06.1991
Liechtenstein         200090 (E)                  15.04.1986        15.04.2006
Liechtenstein         384494 (E)                  20.10.1987        20.10.2007
Liechtenstein         536275 (E)                  25.06.1991        25.06.2011
Luxemborg             200090 (E)                  15.04.1986        15.04.2006

   14



Country               Application/Patent No.      Filing Date       Expiry Date
- -------               ----------------------      -----------       -----------
                                                           
Luxemborg             384494 (E)                  20.10.1987        20.10.2007
Luxemborg             536275 (E)                  25.06.1991        25.06.2001
Netherlands           200090 (E)                  15.04.1986        15.04.2006
Netherlands           384494 (E)                  20.10.1987        20.10.2007
Netherlands           536275 (E)                  25.06.1991        25.06.2011
New Zealand           215887                      18.04.1986        18.04.2002
New Zealand           222168                      14.10.1987        14.10.2003
Spain                 554177                      18.04.1986        18.04.2006
Spain                 8702981                     19.10.1987        19.10.2007
Spain                 536275 (E)                  25.06.1991        25.06.2011
Sweden                384494 (E)                  20.10.1987        20.10.2007
Sweden                536275 (E)                  25.06.1991        25.06.2011
Switzerland           200090 (E)                  15.04.1986        15.04.2006
Switzerland           384494 (E)                  20.10.1987        20.10.2007
Switzerland           536275 (E)                  25.06.1991        25.06.2011
United Kingdom        200090 (E)                  15.04.1986        15.04.2006
United Kingdom        384494 (E)                  20.10.1987        20.10.1987
United Kingdom        536275 (E)                  25.06.1991        25.06.2011
USA                   5262319                     25.06.1990        16.11.2010
USA                   08/118197                   19.04.1985*
USA                   08/2940641                  19.04.1985*
USA                   5817625                     21.09.1992        06.10.2015
USA                   5635489                     21.09.1992        03.06.2014
USA                   5821297                     21.09.1992        20.10.2015
USA                   5871724                     21.09.1992        16.02.2016
USA                   08/457097                   19.04.1985


*     Effective filing date
   15

                                   SCHEDULE 2
                            List of Novartis Patents

A. Case 4-17861



Country               Application/Patent No.      Filing Date       Expiry Date
- --------------------------------------------------------------------------------
                                                           
Australia             638075                      27.11.1990        27.11.2006
Austria               433225 (EP)                 27.11.1990        27.11.2010
Belgium               433225 (EP)                 27.11.1990        27.11.2010
Canada                2031430                     04.12.1990        04.12.2010
Denmark               433225 (EP)                 27.11.1990        27.11.2010
Finland               905956                      03.12.1990        03.12.2010
France                433225 (EP)                 27.11.1990        27.11.2010
Germany               433225 (EP)                 27.11.1990        27.11.2010
Great Britain         89275465                    06.12.1989        (priority
                                                                    application;
                                                                    now lapsed)
Great Britain         433225 (EP)                 27.11.1990        27.11.2010
Greece                433225 (EP)                 27.11.1990        27.11.2010
Hungary               8084/1990                   05.12.1990        05.12.2010
Ireland               4386/90                     05.12.1990        05.12.2010
Israel                96549                       05.12.1990        05.12.2010
Italy                 433225 (EP)                 27.11.1990        27.11.2010
Japan                 330871/90                   30.11.1990
Korea                 9881/90                     05.12.1990
Luxembourg            433225 (EP)                 27.11.1990        27.11.2010
Mexico                172600                      04.12.1990        04.12.2010
Netherlands           433225 (EP)                 27.11.1990        27.11.2010
New Zealand           236333                      04.12.1990        04.12.1990
Norway                301768                      05.12.1990        05.12.2010
Pakistan              132484                      10.11.1990        06.12.2005
Philippines           41681                       05.12.1990
Philippines           47025                       05.12.1990
Philippines           48001                       05.12.1990
Portugal              96068                       04.12.1990
South Africa          9762/90                     05.12.1990        05.12.2010
Spain                 433225 (EP)                 27.11.1990        27.11.2010
Sweden                433225 (EP)                 27.11.1990        27.11.2010
Switzerland           433225 (EP)                 27.11.1990        27.11.2010
Taiwan                56999NI                     13.11.1990        11.06.2007
USA                   621502/07                   03.12.1990
USA                   960309/07 (Cont.)           13.10.1992
USA                   201703/08 (Cont. 2)         25.02.1994
USA                   5650494 (Cont. 3)           07.06.1995        22.07.2014
USA                   789588/08 (Cont. 3/Div)     24.01.1997

   16

                             SCHEDULE 2 continued

B.  Case 4-20038



Country               Application/Patent No.      Filing Date       Expiry Date
- --------------------------------------------------------------------------------
                                                           
Australia             690311                      12.07.1995        12.07.2015
Austria               95926857.4 (EP)             12.07.1995        12.07.2015
Belgium               95926857.4 (EP)             12.07.1995        12.07.2015
Canada                2194582                     12.07.1995        12.07.2015
Denmark               95926857.4 (EP)             12.07.1995        12.07.2015
Europe                95926857.4 (EP)             12.07.1995        12.07.2015
Europe                94810438.5 (EP)             25.07.1994        (priority
                                                                    application;
                                                                    lapsed)
Finland               970229                      12.07.1995        12.07.2015
France                95926857.4 (EP)             12.07.1995        12.07.2015
Germany               95926857.4 (EP)             12.07.1995        12.07.2015
Great Britain         95926857.4 (EP)             12.07.1995        12.07.2015
Greece                95926857.4 (EP)             12.07.1995        12.07.2015
Hungary               P9700210                    12.07.1995        12.07.2015
Ireland               95926857.4 (EP)             12.07.1995        12.07.2015
Israel                114701                      24.07.1995        24.07.2015
Italy                 95926857.4 (EP)             12.07.1995        12.07.2015
Japan                 505400/96                   12.07.1995        12.07.2015
Korea-South           700476/97                   12.07.1995        12.07.2015
Luxembourg            95926857.4 (EP)             12.07.1995        12.07.2015
Mexico                970656                      12.07.1995        12.07.2015
Monaco                95926857.4 (EP)             12.07.1995        12.07.2015
Netherlands           95926857.4 (EP)             12.07.1995        12.07.2015
New Zealand           290373                      12.07.1995        12.07.2015
Norway                P970325                     12.07.1995        12.07.2015
Pakistan              395/95                      23.07.1995        23.07.2011
Philippines           50939                       18.07.1995
Portugal              95926857.4 (EP)             12.07.1995        12.07.2015
Singapore             37588                       12.07.1995        12.07.2015
South Africa          6138/95                     24.07.1995        24.07.2015
Spain                 95926857.4 (EP)             12.07.1995        12.07.2015
Sweden                95926857.4 (EP)             12.07.1995        12.07.2015
Switzerland           95926857.4 (EP)             12.07.1995        12.07.2015
Taiwan                84107188                    11.07.1995        11.07.2015
USA                   08/776445                   12.07.1995        12.07.2015
USA                   09/123233 (Cont.)           28.07.1998        24.01.2017

   17

                             SCHEDULE 2 continued

C.  Case 4-20039



Country               Application/Patent No.      Filing Date       Expiry Date
- --------------------------------------------------------------------------------
                                                           
Australia             699879                      12.07.1995        12.07.2015
Austria               95926858.2                  12.07.1995        12.07. 2015
Belgium               95926858.2                  12.07.1995        12.07. 2015
Canada                2194578                     12.07.1995        12.07. 2015
Denmark               95926858.2                  12.07.1995        12.07. 2015
Europe                95926858.2                  12.07.1995        12.07. 2015
Europe                94810439.3                  25.07.1994        (priority
                                                                    application;
                                                                    lapsed)
Finland               970258                      12.07.1995        12.07.2015
France                95926858.2                  12.07.1995        12.07.2015
Germany               95926858.2                  12.07.1995        12.07.2015
Great Britain         95926858.2                  12.07.1995        12.07.2015
Greece                95926858.2                  12.07.1995        12.07.2015
Hungary               P9700211                    12.07.1995        12.07.2015
Ireland               95926858.2                  12.07.1995        12.07.2015
Israel                114702                      24.07.1995        24.07.2015
Italy                 95926858.2                  12.07.1995        12.07.2015
Japan                 505401/96                   12.07.1995        12.07.2015
Korea-South           700477/97                   12.07.1995        12.07.2015
Luxembourg            95926858.2                  12.07.1995        12.07.2015
Mexico                970657                      12.07.1995        12.07.2015
Monaco                95926858.2                  12.07.1995        12.07.2015
Netherlands           95926858.2                  12.07.1995        12.07.2015
New Zealand           290374                      12.07.1995        12.07.2015
Norway                P970326                     12.07.1995        12.07.2015
Pakistan              396/95                      23.07.1995        23.07.2011
Philippines           50956                       19.07.1995
Portugal              95926858.2                  12.07.1995        12.07.2015
Singapore             36546                       12.07.1995        12.07.2015
South Africa          6139/95                     24.07.1995        24.07.2015
Spain                 95926858.2                  12.07.1995        12.07.2015
Sweden                95926858.2                  12.07.1995        12.07.2015
Switzerland           95926858.2                  12.07.1995        12.07.2015
Taiwan                84107189                    11.07.1995        11.07.2015
USA                   08/776444                   12.07.1995        12.07.2015