Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4890212 | Electric apparatus having a start-up control function | Toshihiko Kumon | 1989-12-26 |
| 4811045 | Electrostatic image forming apparatus | Kouji Matsushita, Hidekazu Nakagami, Tatsumi Makio | 1989-03-07 |
| 4797705 | Image forming apparatus having a high-voltage unit malfunction detecting function | — | 1989-01-10 |