Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4990432 | Silver halide photographic light-sensitive material having a reflective base and an antihalation layer having a specified thickness | Hajime Komatsu, Susumu Ohkawachi, Yasuo Tosaka, Keiichi Hoshimo | 1991-02-05 |
| 4939078 | Direct positive-type silver halide light-sensitive photographic material | Kazuya Kuramoto, Yasuo Tosaka | 1990-07-03 |