Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4873338 | Process for the preparation of 2-amino-5-acylamino phenols and starting compounds suitable therefor | Erich Wolff | 1989-10-10 |
| 4855222 | Color photographic recording material | Gunter Renner, Erich Wolff, Werner Liebe | 1989-08-08 |