Issued Patents All Time
Showing 1–17 of 17 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5063135 | Color diffusion transfer photographic light-sensitive material | Hirokazu Kondo | 1991-11-05 |
| H817 | Photographic light-sensitive material | Keizo Koya | 1990-09-04 |
| 4939066 | Color diffusion transfer photographic element | Keizo Koya | 1990-07-03 |
| 4916047 | Silver halide light-sensitive material | Keizo Koya, Junichi Yamanouchi, Yoshisada Nakamura | 1990-04-10 |
| 4861852 | Polymer mordant | Junichi Yamanouchi | 1989-08-29 |
| 4797349 | Method for forming a color image comprising developing a light sensitive material containing a surfactant with a developer not containing benzyl alcohol | Osamu Takahashi, Tadashi Ogawa, Minoru Sakai | 1989-01-10 |
| 4728595 | Photographic element | Hiroshi Hayashi, Junichi Yamanouchi, Junichi Matsuyama | 1988-03-01 |
| 4725531 | Color photographic light-sensitive material | Toru Harada | 1988-02-16 |
| 4724199 | Silver halide photographic light sensitive materials | Hidetoshi Kobayashi, Isamu Itoh | 1988-02-09 |
| 4721666 | Photographic element | Junichi Yamanouchi | 1988-01-26 |
| 4720446 | Color photographic light-sensitive material | Osamu Takahashi | 1988-01-19 |
| 4594316 | Photographic light-sensitive material with reducible photographically useful moiety releaser | Kiyoshi Morimoto, Keizo Furuya | 1986-06-10 |
| 4582775 | Diffusion transfer color photographic material with meso-ionic 1,2,4-triazolium-3-thiolate antifoggant | Morio Yagihara, Koki Nakamura | 1986-04-15 |
| 4560645 | Color photographic light-sensitive material | Shigetoshi Ono | 1985-12-24 |
| 4551423 | Photographic light-sensitive material with nucleophilic displacement dye releasers | Koichi Koyama, Yasuhiro Noguchi | 1985-11-05 |
| 4374919 | Diffusion transfer color photographic element with U.V. absorbing agent adjacent protective layer | — | 1983-02-22 |
| 4286042 | Light reflecting layer for color diffusion transfer photographic system | Nobuo Sakai, Hiroshi Hayashi, Kazunobu Katoh | 1981-08-25 |