Issued Patents All Time
Showing 25 most recent of 28 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7283775 | Developing device using specific charging unit for charging toner and image forming device adopting the same | Kiyoshi Toizumi, Toshimitsu Gotoh | 2007-10-16 |
| 7071960 | Image forming apparatus | Kiyoshi Toizumi, Toshimitsu Gotoh, Tsutomu Yoshimoto, Yasuhiro Takai | 2006-07-04 |
| 7015938 | Charging system | Kiyoshi Toizumi, Toshimitsu Gotoh | 2006-03-21 |
| 6934496 | Developing device conveying toner using a traveling-wave electric field and image forming apparatus using same | Masamitsu Sakuma, Katsumi Adachi, Kiyoshi Toizumi, Toshimitsu Gotoh | 2005-08-23 |
| 6901232 | Developing apparatus and image forming apparatus using progressive wave electric field transport | Masamitsu Sakuma, Katsumi Adachi, Kiyoshi Toizumi, Toshimitsu Gotoh | 2005-05-31 |
| 6865350 | Charging method and developing device adopting the same | Kiyoshi Toizumi, Toshimitsu Gotoh | 2005-03-08 |
| 6858369 | Toner and manufacturing method thereof | Katsumi Adachi, Masamitsu Sakuma, Kiyoshi Toizumi, Tadashi Iwamatsu, Kenji Mishima | 2005-02-22 |
| 6829446 | Development device, charging method used in the development device and image forming device having the development device | Kiyoshi Toizumi, Toshimitsu Gotoh | 2004-12-07 |
| 6697592 | Developing device, and image forming device having the same | Katsumi Adachi, Masamitsu Sakuma, Kiyoshi Toizumi, Toshimitsu Gotoh | 2004-02-24 |
| 6600892 | Developing device, charging method used therefor, and printing apparatus having the developing device | Toshimitsu Goto, Kiyoshi Toizumi | 2003-07-29 |
| 6596454 | Toner and manufacturing method thereof | Katsumi Adachi, Masamitsu Sakuma, Kiyoshi Toizumi, Tadashi Iwamatsu, Kenji Mishima | 2003-07-22 |
| 6438346 | Developing device, printing device, and charging method through contact | Katsumi Adachi, Kiyoshi Toizumi, Toshimitsu Goto, Masamitsu Sakuma | 2002-08-20 |
| 6212352 | Color image forming apparatus spacially separating toner image heat-fusion from toner image transfer to a recording medium | Toshiaki Kagawa | 2001-04-03 |
| 6088549 | Fixing device having an externally-heated fixing roller | Toshiaki Kagawa, Toshihiro Tamura, Syougo Yokota | 2000-07-11 |
| 6009300 | Toner image fixing member, fixing roller and fixing device | Toshiaki Kagawa, Syougo Yokota, Hisasi Atarasi | 1999-12-28 |
| 6006052 | Fixing method and fixing device | Toshiaki Kagawa | 1999-12-21 |
| 5867760 | Transfer device with an anisotropin conductive layer | Tetsunori Mitsuoka, Atsushi Inoue, Kazuhiko Furukawa, Keiji Yasuda | 1999-02-02 |
| 5416567 | Developing device and a developing method having a conductive member upstream of image data forming member | Tetsuro Toyoshima, Tetsuyuki Ueda, Atsushi Inoue, Hideaki Fujita, Takayuki Yamanaka | 1995-05-16 |
| 5237374 | Image forming apparatus having intermediate transfer member | Yukihiko Ueno, Yasutaka Maeda, Tsuyoshi Miyamoto, Hideyuki Nishimura, Kyouichi Takata | 1993-08-17 |
| 5204729 | Full color copying machine | Yasutaka Maeda, Hideyuki Nishimura, Tsuyoshi Miyamoto, Katsuhiro Nagayama, Natsuko Tanaka +1 more | 1993-04-20 |
| 5194902 | Transfer unit | Yasutaka Maeda, Hideyuki Nishimura, Tsuyoshi Miyamoto, Yukihiko Ueno | 1993-03-16 |
| 5103266 | Electrophotographic apparatus and method of cleaning the same | Tsuyoshi Miyamoto, Yasutaka Maeda, Katsuhiro Nagayama, Hideyuki Nishimura, Natsuko Tanaka | 1992-04-07 |
| 5075731 | Transfer roller device | Yasutaka Maeda, Tuyoshi Miyamoto, Katsuhiro Nagayama, Hideyuki Nishimura, Natsuko Tanaka | 1991-12-24 |
| 5041878 | Method for forming and transferring color images | Yasuhiro Takai, Yoichi Shimazawa, Etsuzi Nukushina | 1991-08-20 |
| 5040028 | Image forming apparatus with a toner transfer device | Yasuhiro Takai, Yoichi Shimazawa, Etsuji Nukushina, Hideo Matsuda | 1991-08-13 |