Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5491123 | Herbicides containing 3-aminobenzo(B)thiophenes as antidotes | Helmut Hagen, Gerhard Nilz, Helmut Walter, Andreas Landes | 1996-02-13 |
| 5342928 | Benzisothiazole- and benzothiophene-azo dyes with a coupling component of the aniline series | Helmut Hagen, Helmut Reichelt, Clemens Grund | 1994-08-30 |