Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5415989 | Color photographic recording material containing a color coupler of the pyrazoloazole series | Erich Wolff | 1995-05-16 |
| 4898811 | Color photographic silver halide material with sulfonylphenol oil former | Erich Wolff, Harry Elias | 1990-02-06 |
| 4812576 | Imino derivatives of 4-halogen-pyrazolone-5 | Erich Wolff, Harry Elias | 1989-03-14 |