Issued Patents All Time
Showing 25 most recent of 26 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5963762 | Electrophotographic apparatus performing image exposure and development simultaneously | Tadashi Furuya, Hideyuki Yano, Harumi Kugo, Osamu Iwasaki | 1999-10-05 |
| 5809379 | Electrophotography having photosensitive member with charge blocking overlayer | Hideyuki Yano, Yasushi Sato, Yukihiro Ohzeki, Harumi Kugoh, Katsuhiro Sakaizawa +2 more | 1998-09-15 |
| RE35581 | Charging device | Shunji Nakamura, Hiromitsu Hirabayashi, Noribumi Koitabashi | 1997-08-12 |
| 5587773 | Electrophotographic apparatus for performing image exposure and development simultaneously | Hideyuki Yano, Yukihiro Ozeki, Harumi Kugo, Katsuhiro Sakaizawa, Tadashi Furuya +1 more | 1996-12-24 |
| 5585894 | Process cartridge with a movable image bearing member as well as a contactable member, and an image forming apparatus having the same | Noribumi Koitabashi, Shunji Nakamura, Hiromitsu Hirabayashi | 1996-12-17 |
| 5567556 | Electrophotographic process and apparatus simultaneously effecting image exposure and developing steps to opposites sides of photosensitive member | Hideyuki Yano, Osamu Iwasaki | 1996-10-22 |
| 5499080 | Image forming apparatus having a voltage controlled contact charger | Tadashi Furuya, Hideyuki Yano, Harumi Kugoh | 1996-03-12 |
| 5485248 | Image forming apparatus having a contact charger for varying a charge applied to a photosensitive drum based on a resistance of the photosensitive layer | Hideyuki Yano, Norio Hashimoto, Harumi Kugoh, Takashi Shibuya, Tadashi Furuya | 1996-01-16 |
| 5450180 | Image forming apparatus having constant current and voltage control in the charging and transfer regions | Yukihiro Ohzeki, Koichi Hiroshima, Yasushi Sato, Toshio Miyamoto, Kimio Nakahata | 1995-09-12 |
| 5420671 | Charger and image forming apparatus with same | Hiroki Kisu, Toshio Miyamoto, Yohji Tomoyuki, Shunji Nakamura, Masanobu Saito | 1995-05-30 |
| 5420679 | Elastic roller and fixing apparatus using same | Masahiro Goto, Yasushi Sato, Shunji Nakamura, Tetsuo Saito, Kazuo Kishino +7 more | 1995-05-30 |
| 5390007 | Charging member, charging device, process cartridge and image forming apparatus | Harumi Kugoh, Hideyuki Yano | 1995-02-14 |
| 5384626 | Charging member, process cartridge and image forming apparatus | Harumi Kugoh, Hideyuki Yano, Tadashi Furuya | 1995-01-24 |
| 5253024 | Fixing apparatus with rectifier element | Koichi Okuda, Yoji Tomoyuki, Toshio Miyamoto, Yukihiro Ohzeki, Masanobu Saito +7 more | 1993-10-12 |
| 5179397 | Image forming apparatus with constant voltage and constant current control | Yukihiro Ohzeki, Tatsunori Ishiyama, Koichi Hiroshima, Yasushi Sato, Kimio Nakahata +5 more | 1993-01-12 |
| 5164779 | Image forming apparatus with dual voltage supplies for selectively charging and discharging an image bearing member | Noribumi Koitabashi, Shunji Nakamura, Hiromitsu Hirabayashi | 1992-11-17 |
| 5159393 | Image forming apparatus having transfer device and image bearing member traveling at different speeds | Koichi Hiroshima, Yukihiro Ohzeki, Yasushi Sato, Tatsunori Ishiyama, Kimio Nakahata +4 more | 1992-10-27 |
| 5151736 | Image forming apparatus with controlled transfer voltage | Yukihiro Ohzeki, Tatsunori Ishiyama, Yasushi Sato, Kimio Nakahata | 1992-09-29 |
| 5144368 | Charging device and image forming apparatus having same | Yukihiro Ohzeki, Tatsunori Ishiyama | 1992-09-01 |
| 5132738 | Image forming apparatus with cleaning mechanism for charging electrode | Shunji Nakamura, Hiroki Kisu, Yohji Tomoyuki, Masanobu Saito, Toshio Miyamoto | 1992-07-21 |
| 5126913 | Charging device with contactable charging means and an image forming apparatus having the charging means and a detachable process unit | Masanobu Saito, Hiroki Kisu, Yohji Tomoyuki, Shunji Nakamura, Noribumi Koitabashi +1 more | 1992-06-30 |
| 5034777 | Transferring device having charging device with double oxide and voltage control | Yukihiro Ohzeki, Koichi Hiroshima, Yoshiaki Nishimura, Jun Murata, Tatsunori Ishiyama +2 more | 1991-07-23 |
| 5010370 | Transfer apparatus and image bearing apparatus using same having transfer means for contacting a backside of a transfer material | Yukihiro Ohzeki, Toshio Miyamoto, Koichi Hiroshima, Yasushi Sato, Kimio Nakahata | 1991-04-23 |
| 5006902 | Image forming apparatus having a predetermined voltage applied to the transfer member | — | 1991-04-09 |
| 4851960 | Charging device | Shunji Nakamura, Hiromitsu Hirabayashi, Noribumi Koitabashi | 1989-07-25 |