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, Takao Ichihashi, Shuji Fujisawa, Takeshi Tsuda | 1989-08-22 |
| 4851873 | Developing device | Shingo Sakao, Shuji Fujisawa, Takeshi Tsuda, Yousuke Ohata, Hiroshi Hiraoka | 1989-07-25 |