Issued Patents 1994
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| H1343 | Direct positive silver halide emulsion and a color diffusion transfer | Katsumi Hirano, Ashita Murai, Seiji Akiyama | 1994-08-02 |
| 5275931 | Silver halide photographic material | Hisashi Okamura, Tadashi Ikeda | 1994-01-04 |