Issued Patents 1989
Showing 1–8 of 8 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4880729 | Method for forming direct positive image comprising developing with a combination of a nucleating agent and a hydrazine derivative | Tatsuo Heki, Noriyuki Inoue | 1989-11-14 |
| 4877723 | Silver halide photographic material comprising a specified nucleating agent | Noriyuki Inoue, Tatsuo Heki | 1989-10-31 |
| 4873172 | Process for forming a superhigh contrast negative image | Shoji Ishiguro, Tadao Shishido, Akio Miyake | 1989-10-10 |
| 4859579 | Silver halide photographic material | Tetsuro Kojima, Mitsuru Yamamoto, Noriyuki Inoue, Tatsuo Heki | 1989-08-22 |
| 4847180 | Silver halide photographic material capable of being handled in a bright room during steps of photomechanical process | Junji Miyata, Ken-ichi Kuwabara, Toshiro Takahashi, Yoshio Inagaki | 1989-07-11 |
| 4835091 | Process for forming a direct positive image | Noriyuki Inoue, Tatsuo Heki | 1989-05-30 |
| 4828973 | Silver halide photographic material with heterocyclic quaternary ammonium nucleating agent | Ashita Murai, Seiji Suzuki | 1989-05-09 |
| 4814261 | Silver halide photographic material containing a development restrainer or a precursor thereof | Seiji Ichijima | 1989-03-21 |