Issued Patents 1982
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4340537 | Monoazo dyes of the thiazole series having a heterocyclic substituent in the 4-position | Heinz Eilingsfeld, Guenter Hansen | 1982-07-20 |
| 4327019 | Acid azo dyes from a 3-amino-benzisothiazole-[2,1]-5-sulfonic acid diazo component | Heinz Eilingsfeld, Guenter Hansen, Georg Zeidler | 1982-04-27 |