Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4847179 | Photographic dye diffusion transfer process and color photographic recording material suitable for this process | Manfred Peters, Wolfgang Himmelmann, Thomas Kaluschke, Gunther Schenk, Kaspar Wingender +1 more | 1989-07-11 |
| 4840871 | Color photographic heat development process | Manfred Peters, Hans hlschlager, Thomas Kaluschke, Kaspar Wingender, Gunther Schenk | 1989-06-20 |
| 4810615 | Colour photographic recording material containing a dye releasing compound for cyan dyes and a colour image produced with these dyes | Hans Vetter, Kaspar Wingender | 1989-03-07 |