Issued Patents All Time
Showing 26–37 of 37 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5826146 | Color image forming device which changes developing bias when switching between developer units | Takayuki Maruta, Hiroshi Takashima, Tomoji Ishikawa, Kazuyuki Sugihara, Shinji Kato | 1998-10-20 |
| 5787328 | Rotary developing device for an image forming apparatus | Kazuyuki Sugihara, Tomoji Ishikawa | 1998-07-28 |
| 5768664 | Toner container for a rotary developing device | Tomoji Ishikawa, Kazuyuki Sugihara, Shinji Kato | 1998-06-16 |
| 5768662 | Toner supply cartridge for rotary developing device | Kazuyuki Sugihara | 1998-06-16 |
| 5765059 | Developing device for image forming apparatus and toner container therefor | Tomoji Ishikawa, Kazuyuki Sugihara | 1998-06-09 |
| 5761576 | Image forming apparatus for supplying power to members of a rotary developing device | Kazuyuki Sugihara, Tomoji Ishikawa | 1998-06-02 |
| 5758235 | Toner container for a rotary developing device | Tomoji Ishikawa, Kazuyuki Sugihara, Shinji Kato | 1998-05-26 |
| 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 |
| 5552877 | Image forming apparatus with controlled drive for accurately positioning developing sections of a rotary developing device | Tomoji Ishikawa, Kazuyuki Sugihara | 1996-09-03 |