Issued Patents 1989
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4868099 | Color photographic recording material with thiosulphonic acid ester | — | 1989-09-19 |
| 4855216 | No-rinse photographic processing method and the stabilizing bath used for this method | Heinz Meckl, Erika Spriewald | 1989-08-08 |
| 4855222 | Color photographic recording material | Erich Wolff, Heinz Wiesen, Werner Liebe | 1989-08-08 |
| 4855441 | Process for the preparation of thioether compounds | Erich Illner | 1989-08-08 |
| 4840880 | Color photographic recording material containing a yellow DIR coupler | Hans Ohlschlager, Friedrich-Wilhelm Kunitz, Heinrich Odenwalder, Dirk Hubner | 1989-06-20 |