Issued Patents 1989
Showing 1–10 of 10 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4876174 | Method of processing silver halide color photosensitive material using developer comprising dialkyl hydroxylamine and no benzyl alcohol | Takatoshi Ishikawa | 1989-10-24 |
| 4863836 | Method for processing silver halide color photographic materials and color photographic developing composition | Takatoshi Ishikawa, Nobutaka Ohki | 1989-09-05 |
| 4851321 | Superhigh contrast negative-type silver halide photographic material | Yoshihiro Takagi, Hisashi Okada, Kazunobu Katoh | 1989-07-25 |
| 4849324 | Method of processing silver halide color photographic material using a reduced amount of replenisher | Shunichi Aida, Shinzo Kishimoto, Hiroshi Fujimoto | 1989-07-18 |
| 4842993 | Method for processing silver halide color photographic material | Hiroshi Fujimoto, Takatoshi Ishikawa, Kazuto Andoh | 1989-06-27 |
| 4833064 | Process for the formation of a high contrast negative image | Eiichi Okutsu, Mitsunori Hirano, Katsumi Hayashi | 1989-05-23 |
| 4803146 | Method to form image for silver salt diffusion transfer using fogging agent | Noriyuki Inoue, Yoshio Idota | 1989-02-07 |
| 4801521 | Method for processing silver halide color photographic material with a color developer comprising a hydrazine derivative | Nobutaka Ohki, Nobuo Seto, Hideaki Naruse, Kazuto Andoh, Takatoshi Ishikawa +1 more | 1989-01-31 |
| 4801516 | Method of processing silver halide color photographic material using a developer comprising a hydroxylamine and an antifoggant | Takatoshi Ishikawa | 1989-01-31 |
| 4798783 | Method of processing silver halide color photographic material and photographic color developing composition | Takatoshi Ishikawa, Hiroshi Fujimoto, Nobutaka Ohki | 1989-01-17 |