Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5990355 | Substituted diaminophenols, process for their preparation, and hair dyes containing such compounds | Mustafa Akram, Wolfgang Wolff, Andreas Bittner | 1999-11-23 |
| 5676706 | Substituted diaminophenols, and hair dyes containing such compounds | Mustafa Akram, Wolfgang Wolff, Andreas Bittner | 1997-10-14 |