Issued Patents All Time
Showing 26–27 of 27 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4231748 | Azo dyestuffs | Herbert Hugl | 1980-11-04 |
| 4218373 | Water-soluble phenylazoaminonaphthol sulphonic acid dyestuffs | Erich Klauke, Hans Otten | 1980-08-19 |
Showing 26–27 of 27 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4231748 | Azo dyestuffs | Herbert Hugl | 1980-11-04 |
| 4218373 | Water-soluble phenylazoaminonaphthol sulphonic acid dyestuffs | Erich Klauke, Hans Otten | 1980-08-19 |