Issued Patents All Time
Showing 26–27 of 27 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6024768 | Diaminoalkane and oxidation colorants | Andreas Bittner | 2000-02-15 |
| 5961668 | 4-(2,4-diaminophenoxymethyl)-1,3-dioxolane secondary intermediates, processes for their production, and hair colorants | Mustafa Akram, Wolfgang Bauer, Andreas Bittner | 1999-10-05 |