Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4803151 | Photographic material for the silver dye bleach process comprising an AZO dye, capable of laking, in gelatine | Rolf Steiger | 1989-02-07 |
| 4357280 | Use of tertiary phosphines in photographic silver dye bleach materials | Christoph Chylewski, Gerald Jan, Roland Kurzen, Max Meier | 1982-11-02 |
| 4271254 | Process for producing photographic images | Leslie F. A. Mason, Robert Stanley Cook, David Kilcast, Christoph Chylewski | 1981-06-02 |
| 4186008 | Method for processing silver dye-bleach materials | Meinrad Schar | 1980-01-29 |