Issued Patents All Time
Showing 76–100 of 109 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4956267 | Method for forming a direct positive color image | Shinji Ueda, Tatsuo Heki, Takatoshi Ishikawa, Nobutaka Ohki, Morio Yagihara +3 more | 1990-09-11 |
| 4954427 | Process for the formation of direct positive images | Tetsuro Kojima, Tatsuo Heki, Shigeo Hirano | 1990-09-04 |
| 4952483 | Direct positive silver halide photosensitive material and method for forming direct positive image | Morio Yagihara, Hisashi Okada, Tetunoti Matushita, Satoshi Nagaoka, Tetsuro Kojima | 1990-08-28 |
| 4948712 | Direct positive photographic materials and a method of forming direct positive images | Tatsuo Heki, Hidetoshi Kobayashi, Naoyasu Deguchi, Shigeo Hirano | 1990-08-14 |
| 4933265 | Process for forming direct positive color image | Tatsuo Heki, Tetsuro Kojima, Shinji Ueda | 1990-06-12 |
| 4925777 | Direct positive color image forming method | Takashi Ozawa | 1990-05-15 |
| 4914009 | Process for forming direct positive color image comprising the use of bleach accelerators | Shinji Ueda, Tatsuo Heki | 1990-04-03 |
| 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 |
| 4790286 | EGR control device for internal combustion engine | Minoru Nishida, Yoshiaki Asayama, Hiroyoshi Suzuki | 1988-12-13 |
| 4789627 | Method for forming direct positive color images | Tatsuo Heki, Shinji Ueda | 1988-12-06 |
| 4727849 | Exhaust gas recirculation control system for an internal combustion engine | Minoru Nishida | 1988-03-01 |
| 4728596 | Light-sensitive element for silver salt diffusion transfer with iodine trapping layer | Hideki Takaki, Yukio Karino | 1988-03-01 |
| 4677052 | Silver salt diffusion transfer photographic material comprising fine and coarse grain silver halide | — | 1987-06-30 |
| 4659646 | Silver salt diffusion transfer photographic material | — | 1987-04-21 |
| 4654297 | Silver salt diffusion transfer element comprising two silver halide layers | — | 1987-03-31 |
| 4560637 | Silver halide sensor type polymerizable light-sensitive material | Minoru Maeda, Mikio Totsuka | 1985-12-24 |