Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| H1281 | High-contrast silver halide photographic material | Kazuhiko Hirabayashi, Takeshi Sampei, Miho Sai | 1994-01-04 |
| 5155007 | Silver halide photographic material | Akira Kobayashi, Takeshi Sampei, Miho Sai, Akira Ogasawara | 1992-10-13 |
| 5130226 | Silver halide photographic light-sensitive material | Takeshi Sampei, Akira Ogasawara, Miho Sai | 1992-07-14 |