Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4881980 | Pigments of the quinacridonequinone series, processes for their preparation and their use | Erwin Dietz | 1989-11-21 |
FP
Frank Prokschy
Overall (1989): #114,200 of 140,708Top 85%
1
Patents 1989