Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4404274 | Photographic light sensitive element containing yellow color coupler and method for forming yellow photographic images | Atsuaki Arai, Akio Okumura, Kiyoshi Nakazyo | 1983-09-13 |
| 4324855 | Process for developing a silver halide emulsion | Shigeo Hirano | 1982-04-13 |
| 4323635 | Direct reversal photographic color material | — | 1982-04-06 |
| 4269936 | Process of forming yellow photographic images | Atsuaki Arai, Kiyoshi Nakazyo, Atsushi Sugizaki, Akio Okumura | 1981-05-26 |