Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 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 |