Issued Patents All Time
Showing 51–67 of 67 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6920299 | Image forming apparatus and intermediate transfer unit detachably mountable thereon | Tatsuya Kobayashi, Takashi Shibuya, Seiji Saito, Hidekazu Matsuda | 2005-07-19 |
| 6912369 | Image forming apparatus | Seiji Saito, Tatsuya Kobayashi, Koichi Suzuki, Takamitsu Soda | 2005-06-28 |
| 6856777 | Image forming apparatus with first and second charging members for charging residual toner | Naoki Enomoto, Takashi Shibuya, Seiji Saito | 2005-02-15 |
| 6711367 | Image forming apparatus and belt unit detachably mountable thereto | Seiji Saito, Naoki Enomoto, Takashi Shibuya | 2004-03-23 |
| 6615002 | Image forming apparatus and process cartridge for applying an alternating current to a charging member or charging means for charging an image bearing member | Seiji Saito, Tomohiro Nakamori, Hiroshi Takami, Hiroaki Sakai, Takeshi Kawamura | 2003-09-02 |
| 6611669 | Image forming apparatus with superposed direct current and alternating current charging voltage | Jun Suzuki, Satoshi Tsuruya, Katsuhiro Sakaizawa | 2003-08-26 |
| 6603935 | Image forming apparatus featuring application of superimposed DC and AC voltages and DC voltage | Satoshi Tsuruya, Katsuhiro Sakaizawa, Jun Suzuki | 2003-08-05 |
| 6564023 | Image forming apparatus with AC current detector | Hiroshi Takami, Tomohiro Nakamori, Seiji Saito | 2003-05-13 |
| 6560426 | Image forming apparatus | Katsuhiro Sakaizawa, Satoshi Tsuruya, Jun Suzuki | 2003-05-06 |
| 6539184 | Image forming apparatus with current control | Tomohiro Nakamori, Hiroshi Takami, Hiroaki Sakai, Seiji Saito | 2003-03-25 |
| 6493534 | Sheet conveying apparatus and image forming apparatus | Kei Sawanaka, Masao Ando, Takayasu Yuminamochi, Tomio Noguchi, Minoru Matsuguma +1 more | 2002-12-10 |
| 6397017 | Developer amount detecting method, developing device, process cartridge and electrophotographic image forming apparatus | Hiroaki Sakai, Kazushi Watanabe, Toshiyuki Karakama, Hideki Matsumoto, Seiji Saito | 2002-05-28 |
| 6282384 | Developing device, process cartridge and electrophotographic image forming apparatus | Seiji Saito, Hiroaki Sakai | 2001-08-28 |
| 6266495 | Image forming apparatus using transfer roller having low resistance unevenness in circumferential direction | Takayasu Yuminamochi | 2001-07-24 |
| 6173135 | Image forming apparatus with a bias control feature | Takayasu Yuminamochi | 2001-01-09 |
| 6052549 | Charging roller, and process cartridge and image-forming apparatus employing the roller | Masaharu Ohkubo, Takayasu Yuminamochi | 2000-04-18 |
| 5915145 | Image forming apparatus | Hiroaki Sakai | 1999-06-22 |