Issued Patents All Time
Showing 1–15 of 15 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4894312 | Dye diffusion process with base precursor salts of strong organic bases and weak organic acids | Holger Ohst, Carlhans Suling, Gunther Schenk, Kaspar Wingender, Manfred Peters | 1990-01-16 |
| 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 |
| 4605954 | Method of and arrangement for adjusting color saturation in a video printer | Friedrich Bestenreiner, Josef Helmberger | 1986-08-12 |
| 4537486 | Apparatus for the exposure and development of photographic images | Hermann Luhrig, Guido Kovacic | 1985-08-27 |
| 4532201 | Process and an apparatus for the development of photographic two-sheet diffusion materials | Guido Kovacic | 1985-07-30 |
| 4508809 | Process for the exposure and development of photo-graphic images and an apparatus for carrying out the process | Hermann Luhrig, Guido Kovacic | 1985-04-02 |
| 4486085 | Apparatus for developing color-photographic images in etching alkaline solutions according to the color diffusion process | Guido Kovacic, Victor Osegowitsch | 1984-12-04 |
| 4429033 | Process for the production of color prints by the dye-diffusion transfer process | Manfred Peters, Thomas Kaluschke | 1984-01-31 |
| 4407929 | Color photographic recording material for the production of colored images by the dye diffusion transfer process | Kaspar Wingender | 1983-10-04 |
| 4399212 | Method of processing an exposed photographic material and processing band for carrying out the method | Hermann Luhrig, Guido Kovacic, Karlheinz Keller | 1983-08-16 |
| 4379829 | Photographic material containing a temporary barrier layer applied from an organic solution | Werner Krafft, Gunter Helling, Guunther Matschke | 1983-04-12 |
| 4204867 | Process for the production of color photographic images using new white coupler substances | Karl Kuffner, Wolfgang Lassig, Ernst Meier, Gertrud Kirchhoff, Helmut Haseler +1 more | 1980-05-27 |
| 4186016 | Color photographic recording material | Joachim W. Lohmann, Otto Lapp | 1980-01-29 |