Issued Patents All Time
Showing 1–8 of 8 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4455359 | Tamper-proof document | Walter Patzold, Werner Verburg | 1984-06-19 |
| 4450225 | Silver halide emulsion prepared by converting silver phosphate | Edith Weyde, Wilhelm Saleck, Heinz-Horst Teitscheid | 1984-05-22 |
| 4413055 | Silver halide emulsion, a photographic material and a process for the production of photographic images | Edith Weyde, Wilhelm Saleck, Heinz-Horst Teitscheid | 1983-11-01 |
| 4401751 | Silver salt emulsion, photographic material and process for the production of photographic images | Edith Weyde, Wilhelm Saleck, Heinz-Horst Teitscheid | 1983-08-30 |
| 4379837 | Process for the preparation of silver halide emulsions, photographic materials, and a process for the production of photographic images | Otto Lapp, Franz Moll, Lothar Endres | 1983-04-12 |
| 4298683 | Light-sensitive photographic material | Manfred Becker, Angela Slabik, Bruno Mucke, Erik Moisar | 1981-11-03 |
| 4263396 | Direct-positive photographic material | Sieghart Klotzer, Erik Moisar | 1981-04-21 |
| 4241173 | Process for the preparation of silver halide emulsions | Wilhelm Saleck | 1980-12-23 |