Issued Patents 1994
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5372911 | Process of forming super high-contrast negative images and silver halide photographic material and developer being used therefor | Naoki Obi, Yasuhiko Kojima, Jun Takeuchi, Kiyoshi Suematsu | 1994-12-13 |
| 5362621 | Direct positive silver halide photographic material and method for forming high contrast positive image using the same | Naoki Obi, Kiyoshi Suematsu, Yasuhiko Kojima, Masatoshi Katayama | 1994-11-08 |
| 5284733 | High-contrast image forming process | Yasuhiko Kojima, Naoki Obi, Kiyoshi Suematsu | 1994-02-08 |
| 5275915 | Developer for light-sensitive material | Yasuhiko Kojima | 1994-01-04 |