Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5006449 | Silver halide black and white photographic material | Ichizo Toya, Masaki Okazaki | 1991-04-09 |
| 4500632 | Process for stabilizing silver images | Masaaki Torigoe, Isamu Itoh, Katsumi Hayashi | 1985-02-19 |