Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4476052 | Azo pigment having improved hiding power and a process for its preparation | Klaus Hunger, Joachim Ribka, Wolfgang Rieper | 1984-10-09 |
| 4370269 | Monoazo pigment derived from acetoacetylamino benzimidazolone | Klaus Hunger, Ernst Klappert | 1983-01-25 |