Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4871749 | 4-heteropentacyclic-4-(N-(phenyl)amido) piperidine derivatives and pharamaceutical compositions and method employing such compounds | Bor-Sheng Lin, H. Kenneth Spencer | 1989-10-03 |
| 4849521 | Stereoselective preparation of 3-substituted-4-piperidine compounds and derivatives | H. Kenneth Spencer, Sherry A. Severnak | 1989-07-18 |
| 4801615 | 4-heterohexacyclic-4-(N-(phenyl)amido) piperidine derivatives and pharmaceutical compositions and method employing such compounds | H. Kenneth Spencer | 1989-01-31 |