Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5315351 | Image forming apparatus | Naoki Toyoshi, Tsugihito Yoshiyama | 1994-05-24 |
| 5159388 | Image forming apparatus | Tsugihito Yoshiyama, Hiroshi Okamoto, Masataka Oda, Masayasu Haga | 1992-10-27 |
| 5122834 | Developing apparatus for determining decreased concentration of toner | Hiroshi Okamoto, Chujiro Yokoyama, Yasuhiro Kusuda | 1992-06-16 |
| 4819020 | Fixing roller and its manufacturing process | Etsuaki Urano | 1989-04-04 |