Issued Patents 1994
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5342928 | Benzisothiazole- and benzothiophene-azo dyes with a coupling component of the aniline series | Thomas Roetsch, Helmut Reichelt, Clemens Grund | 1994-08-30 |
| 5306815 | Azo dyes with a coupling component of the quinoline series | Erwin Hahn, Clemens Grund, Andreas Geisberger, Helmut Reichelt, Andreas Guldner +3 more | 1994-04-26 |