Issued Patents All Time
Showing 1–7 of 7 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4436810 | Color-photographic recording material containing non-diffusing electron donor precursor compounds | Karl Kuffner, Paul Marx | 1984-03-13 |
| 4371604 | Photographic material suited for use in diffusion transfer photography | Christian C. Van de Sande, Wilhelmus Janssens, Ernst Meier | 1983-02-01 |
| 4369243 | Photographic recording material for diffusion processes and useful non-diffusing sulfilimine compounds | Hans-Heinrich Credner, Karl-Wilhelm Schranz | 1983-01-18 |
| 4366240 | Color photographic recording material containing non-diffusing electron donor precursor compounds | Ernst Meier, Siegfried Schleger | 1982-12-28 |
| 4275200 | Process for the production of oxazolinone-2-compounds | Fritz Benker, Hans-Heinrich Credner, Ernst Meier, Siegfried Schleger | 1981-06-23 |
| 4204867 | Process for the production of color photographic images using new white coupler substances | Karl Kuffner, Ernst Meier, Immo Boie, Gertrud Kirchhoff, Helmut Haseler +1 more | 1980-05-27 |
| 4183752 | Light-sensitive photographic material | Karl Kuffner, Ernst Meier, Erwin Ranz, Karl-Wilhelm Schranz | 1980-01-15 |