Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4697035 | Process for the preparation of basically substituted phenylacetonitriles | Lothar Kisielowski, Ingomar Grafe, Kurt H. Ahrens | 1987-09-29 |
| 4420488 | Quaternary 1,1-diphenyl-4-pyrrolidinium-2-butyne salts, a process for their production and medicaments containing these compounds | Hans Liedtke | 1983-12-13 |