Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4865960 | Polymeric magneta coupler and a colour photographic recording material containing this polymeric magenta coupler | Erich Wolff | 1989-09-12 |
| 4840885 | Color photographic recording material for the dye diffusion transfer process | Manfred Peters, Helmut Reiff | 1989-06-20 |