Issued Patents All Time
Showing 1–11 of 11 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6686942 | Memory device for an image forming apparatus storing characteristics information about a process cartridge detachably attachable to the apparatus | Keiji Okano, Gaku Konishi | 2004-02-03 |
| 6559875 | Image forming apparatus with pixel density based light beam control | Keiji Okano, Shinichi Tsukida | 2003-05-06 |
| 6532030 | Process cartridge, image forming apparatus, and image forming method | Keiji Okano, Gaku Konishi | 2003-03-11 |
| 6272306 | Developing apparatus and image forming apparatus having first and second voltages applied to a developing satisfying predetermined relationships | Masanobu Saito, Keiji Okano, Gaku Konishi, Yasushi Shimizu, Hiroshi Satoh +1 more | 2001-08-07 |
| 6167212 | Development density adjusting method for image forming apparatus | Hiroshi Satoh, Keiji Okano, Masanobu Saito, Gaku Konishi, Yasushi Shimizu +1 more | 2000-12-26 |
| 6052544 | Image forming apparatus using specific electric field to transfer strontium titanate-containing developer to a drum | Yasushi Shimizu | 2000-04-18 |
| 6035150 | Developing apparatus for judging residual amount of developing agent using detection member moving at predetermined cycle | Yasushi Shimizu | 2000-03-07 |
| 6026253 | Electrophotographic image forming apparatus and a developing unit and a process cartridge mountable to a main body thereof each including a portion for detecting the remaining amount of a developing agent contained in the developing unit | Yasushi Shimizu | 2000-02-15 |
| 5682574 | Developing apparatus having reciprocating cleaning device for photodetector | Haruhisa Oshida, Keiji Okano, Masahide Kinoshita, Koji Takahashi, Yasushi Shimizu | 1997-10-28 |
| 5649264 | Developing unit having optical detection of a residual quantity of developer in a developer container | Keiji Okano, Masahide Kinoshita, Yasushi Shimizu | 1997-07-15 |
| 5589918 | Process cartridge, assembling method therefor and electrophotographic apparatus | Haruhisa Oshida, Keiji Okano, Masahide Kinoshita, Koji Takahashi, Yasushi Shimizu | 1996-12-31 |