Issued Patents 1997
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5662912 | Sugar monoacid amides in cosmetic preparations | Rolf Wachter | 1997-09-02 |
| 5616150 | Isatin-containing formulations for coloring keratin-containing fibers | Horst Hoeffkes | 1997-04-01 |
| 5611817 | Isatin derivatives for coloring keratin-containing fibers | Horst Hoeffkes | 1997-03-18 |