Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4399214 | Process for hardening color photographic silver halide emulsion layers | — | 1983-08-16 |
| 4379828 | Image receptor element for the dye diffusion transfer process | Werner Liebe, Willibald Pelz | 1983-04-12 |
| 4297438 | Color-photographic development process | Helmut Haseler, Heinz Meckl, Willibald Pelz | 1981-10-27 |
| 4186007 | Regeneration of spent color developers | Heinz Meckl | 1980-01-29 |