Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4376077 | Sulpho group-containing anthraquinone dyestuffs | Roland Wald | 1983-03-08 |
| 4267115 | Anthraquinone compounds | Wolfgang Frey | 1981-05-12 |
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4376077 | Sulpho group-containing anthraquinone dyestuffs | Roland Wald | 1983-03-08 |
| 4267115 | Anthraquinone compounds | Wolfgang Frey | 1981-05-12 |