Issued Patents All Time
Showing 26–27 of 27 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4237278 | Amino derivatives of 2-methyl-5-(2-hydroxystyryl)-1,3,4-thiadiazole | Peter C. Thieme, Helmut Hagen, Albrecht Franke, Dieter Lenke, Josef Gries | 1980-12-02 |
| 4189433 | 4-Hydroxy-1,2-benzisothiazoles and their manufacture | Ulrich Ohnsorge, Helmut Hagen | 1980-02-19 |