Issued Patents 1989
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4883795 | Piperazinyl-heterocyclic compounds | Arthur A. Nagel | 1989-11-28 |
| 4880810 | Quinazolinediones and pyridopyrimidinediones | — | 1989-11-14 |
| 4831031 | Aryl piperazinyl-(C.sub.2 or C.sub.4) alkylene heterocyclic compounds having neuroleptic activity | Arthur A. Nagel | 1989-05-16 |
| 4797403 | Quinazolinediones and pyridopyrimidinediones | — | 1989-01-10 |