Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4860053 | Color image forming apparatus having a plurality of developing units | Haruo Yamamoto, Shuji Fujisawa, Eiichi Tone, Takeshi Tsuda | 1989-08-22 |
| 4827283 | Lighting control method and a lighting control apparatus of a light source in an image forming apparatus | Haruo Yamamoto | 1989-05-02 |