Issued Patents 1982
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4327019 | Acid azo dyes from a 3-amino-benzisothiazole-[2,1]-5-sulfonic acid diazo component | Heinz Eilingsfeld, Guenter Hansen, Guenther Seybold | 1982-04-27 |
| 4315756 | Oil-soluble azo dye with N-substituted .beta.-naphthylamine as coupling component | Johannes Dehnert, Guenter Hansen, Guenther Riedel | 1982-02-16 |