Issued Patents 1982
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4332955 | Preparation of transparent pigmentary forms of 4,4',7,7'-tetrachlorothioindigo | Helmut Hoch, Heinrich Hiller | 1982-06-01 |
| 4322210 | Auxiliary, and process, for the soaking of hides | Dietrich Lach, Rolf Streicher | 1982-03-30 |