Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5508153 | Composition for developing a black-and-white silver halide photographic light-sensitive material | Wataru Ishikawa, Takeshi Sanpei | 1996-04-16 |
| 5219724 | Method for producing a silver halide photographic light-sensitive material | Takeshi Sampei | 1993-06-15 |
| 5070005 | Process for producing silver halide photographic materials | Takeo Arai, Toshiharu Nagashima | 1991-12-03 |