Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4883746 | Silver halide photographic material | Hiroshi Fukuzawa, Seiji Ichijima | 1989-11-28 |
| 4837136 | Silver halide photographic materials comprising non-diffusible photographically useful compounds | Seiji Ichijima, Jun Arakawa | 1989-06-06 |