Issued Patents 1989
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4886797 | Heterocyclic compounds and their preparation and use | Frank Watjen | 1989-12-12 |
| 4880799 | Heterocyclic compounds and their preparation and use | Frank Watjen | 1989-11-14 |
| 4877792 | Heteroaryloxy-beta-carboline derivatives, their preparation and their use as medicinal agents | Helmut Biere, Andreas Huth, Dieter Rahtz, Ralph Schmiechen, Dieter Seidelmann +2 more | 1989-10-31 |
| 4870073 | Heterocyclic compounds and their preparation and use | Frank Watjen | 1989-09-26 |
| 4855295 | Tetrahydro-beta-carbolines, and their use as drugs | Helmut Biere, Andreas Huth, Dieter Rahtz, Ralph Schmiechen, Dieter Seidelmann +1 more | 1989-08-08 |
| 4795749 | Imidazopyrroloquinoxaline compounds | Frank Watjen | 1989-01-03 |