Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4868102 | Direct positive silver halide light-sensitive photographic material | Atsushi Kamitakahara, Eiichi Sakamoto, Nariko Isozaki | 1989-09-19 |
| 4863838 | Direct positive type light-sensitive silver halide photographic materials | Yasuo Tosaka | 1989-09-05 |
| 4840879 | Direct positive image-forming process | Atushi Kamitakahara | 1989-06-20 |