Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4885301 | Purinone derivatives which have bronchodilator, vasodilator and anti-allergic activities | — | 1989-12-05 |
| 4861773 | Heterocyclic compounds | Lawrence I. Kruse | 1989-08-29 |
| 4820819 | 5-phenyl-3[2H]-pyridazinone derivatives | Anthony Maitland Roe, Robert A. Slater, Stephen P. Breukelman | 1989-04-11 |