Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5606403 | Toner supply control system for an electrophotographic apparatus | Toru Kikuchi, Shuho Yokokawa, Isao Watanabe, Satoshi Aita, Hidenori Takayasu +4 more | 1997-02-25 |
| 4888620 | Process cartridge and image forming apparatus using the same | Hitoshi Fujino, Takamasa Sawada, Hiroo Kobayashi, Tadashi Yagi, Yasuyoshi Hayakawa | 1989-12-19 |
| 4866487 | Image forming apparatus | Takamasa Sawada | 1989-09-12 |