Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4925780 | Direct positive silver halide light-sensitive color photographic material | Tomimi Yoshizawa, Keiji Ogi | 1990-05-15 |
| 4917991 | Direct positive silver halide photographic material | Yasuo Tosaka, Keiji Ogi | 1990-04-17 |
| 4910130 | Direct positive light-sensitive silver halide photographic material | Keiji Ogi | 1990-03-20 |
| 4840879 | Direct positive image-forming process | Keiji Ogi | 1989-06-20 |
| 4192680 | Process for treating light-sensitive silver halide color photographic material | Isamu Fushiki, Keiichi Mori | 1980-03-11 |