Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4851575 | Process for the preparation of 2-nitro-4-sulfamyldiphenylamine dyestuffs | Theodor Papenfuhs | 1989-07-25 |
WB
Werner Brodt
Overall (1989): #45,279 of 140,708Top 35%
1
Patents 1989