Issued Patents 2004
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6803181 | Dye-forming coupler, silver halide photographic light-sensitive material, and method for producing an azomethine dye | Jun Ogasawara, Kiyoshi Takeuchi, Yasuhiro Shimada, Yasuaki Deguchi | 2004-10-12 |
| 6727053 | Dye-forming coupler, silver halide photographic light-sensitive material and azomethine dye compound | Kiyoshi Takeuchi, Mario Aoki, Jun Ogasawara, Yasuhiro Shimada, Seiji Ichijima +6 more | 2004-04-27 |
| 6677110 | Dye-forming coupler, silver halide photographic light-sensitive material, and azomethine dye compound | Kiyoshi Takeuchi, Mario Aoki | 2004-01-13 |