1. G.d. Searle & Company (76 from 1,323 patents)

2. G.d. Searle LLC (14 from 33 patents)

3. Monsanto Company (12 from 3,288 patents)

4. Pharmacia Corporation (12 from 220 patents)

5. Elan Pharmaceuticals, Inc. (4 from 202 patents)

6. Mallinckrodt, Inc. (3 from 717 patents)

7. Pharmacia & Upjohn Company (3 from 523 patents)

8. Other (2 from 832,912 patents)

9. The University of Texas System (2 from 5,463 patents)

10. Washington University (2 from 1,591 patents)

11. Medibeacon Development LLC (2 from 3 patents)

12. Pharmacia & Upjohn (1 from 117 patents)

13. Mosanto Company (1 from 2 patents)

14. Monsanto Company of St. Louis (1 from 2 patents)

15. Pfizer Products Inc. (47 patents)

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11. 7727997 - N,N'-substituted-1,3-diamino-2-hydroxypropane derivatives

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13. 7339078 - Bis-amino acid hydroxyethylamino sulfonamide retroviral protease inhibitors

14. 7320983 - α- and β-amino acid hydroxyethylamino sulfonamides useful as retroviral protease inhibitors

15. 7312333 - Retroviral protease inhibitors