Issued Patents 1997
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5671470 | Color image forming device which changes developing bias when switching between developer units | Takayuki Maruta, Hiroshi Takashima, Tomoji Ishikawa, Kazuyuki Sugihara, Shinji Kato | 1997-09-23 |
| 5646721 | Image forming apparatus for supplying power to members of a rotary developing device | Kazuyuki Sugihara, Tomoji Ishikawa | 1997-07-08 |
| 5617198 | Image forming apparatus having rotary developing device | Tomoji Ishikawa, Kazuyuki Sugihara | 1997-04-01 |
| 5612769 | Submodular unit for use in a modular rotary developing apparatus | Kazuyuki Sugihara | 1997-03-18 |