Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5073468 | Method of forming electrophotographic image | Tadao Yamamoto, Tetsuya Abe, Shinichi Hisatomi, Mitsugu Oishi, Toshiro Honda +2 more | 1991-12-17 |
| 4755853 | Cleaning device | Shigeru Shimizu, Yoji Kuriyama | 1988-07-05 |
| 4660962 | Cleaning device | Nobuaki Maekawa, Shigeru Shimizu, Yoji Kuriyama | 1987-04-28 |