Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4643965 | Direct positive photographic light-sensitive materials | Tetsuo Yoshida, Hideki Ohmatsu | 1987-02-17 |
| 4582779 | Internal latent image-type direct positive silver halide emulsions and photographic materials | Tadao Sugimoto | 1986-04-15 |