Issued Patents 1989
Showing 1–10 of 10 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, Shigeo Hirano | 1989-11-14 |
| 4880727 | Direct positive photographic material | Tatsuo Heki | 1989-11-14 |
| 4877723 | Silver halide photographic material comprising a specified nucleating agent | Shigeo Hirano, Tatsuo Heki | 1989-10-31 |
| 4871653 | Process for forming direct-positive image | Tatsuo Heki, Tetsuro Kojima | 1989-10-03 |
| 4863839 | Direct positive color image forming process | Tatsuo Heki | 1989-09-05 |
| 4859579 | Silver halide photographic material | Shigeo Hirano, Tetsuro Kojima, Mitsuru Yamamoto, Tatsuo Heki | 1989-08-22 |
| 4835091 | Process for forming a direct positive image | Tatsuo Heki, Shigeo Hirano | 1989-05-30 |
| 4816290 | Process of forming solid granular film | Tatsuo Heki | 1989-03-28 |
| 4803146 | Method to form image for silver salt diffusion transfer using fogging agent | Yoshio Idota, Morio Yagihara | 1989-02-07 |
| 4801520 | Direct positive color light-sensitive material comprising a DIR coupler and a pyrazoloazole coupler, and a process for forming a direct positive image | Tatsuo Heki | 1989-01-31 |