Issued Patents All Time
Showing 1–25 of 44 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6047149 | Image forming apparatus having a rotatable first developing member, and a fixed second developing member having a housing partially covering the first developing member | Katsuhiko Nishimura, Masuo Yamazaki, Masami Takeda, Hiromichi Yamada, Tatsuya Nakamura +5 more | 2000-04-04 |
| 5940668 | Image forming apparatus with voltage polarity switching means | Koichi Tanigawa, Akihiko Takeuchi, Hideo Nanataki, Kazuaki Ono | 1999-08-17 |
| 5600431 | Image forming apparatus for forming color image with dry developer | Masami Takeda, Masuo Yamazaki, Katsuhiko Nishimura, Hiromichi Yamada, Tatsuya Nakamura +5 more | 1997-02-04 |
| 5519471 | Developer carrying member utilizing oscillating bias having constant-voltage-DC component and constant-current AC component, and developing apparatus and image forming apparatus using same | Katsuhiko Nishimura, Koichi Tanigawa, Toshio Miyamoto, Makoto Takeuchi | 1996-05-21 |
| 5450180 | Image forming apparatus having constant current and voltage control in the charging and transfer regions | Yukihiro Ohzeki, Koichi Hiroshima, Junji Araya, Yasushi Sato, Toshio Miyamoto | 1995-09-12 |
| 5438398 | Image forming apparatus with intermediate transfer member | Koichi Tanigawa, Akihiko Takeuchi, Hideo Nanataki, Kazuaki Ono | 1995-08-01 |
| 5253024 | Fixing apparatus with rectifier element | Koichi Okuda, Yoji Tomoyuki, Toshio Miyamoto, Junji Araya, Yukihiro Ohzeki +7 more | 1993-10-12 |
| 5220623 | Image processing apparatus which can shift reproduction position of image areas, character train, etc. | Toshiaki Yagasaki, Shunji Nakamura, Mitsuru Kurata, Kazuotshi Shimada, Toshiro Matsui | 1993-06-15 |
| 5179397 | Image forming apparatus with constant voltage and constant current control | Yukihiro Ohzeki, Tatsunori Ishiyama, Koichi Hiroshima, Junji Araya, Yasushi Sato +5 more | 1993-01-12 |
| 5159393 | Image forming apparatus having transfer device and image bearing member traveling at different speeds | Koichi Hiroshima, Yukihiro Ohzeki, Junji Araya, Yasushi Sato, Tatsunori Ishiyama +4 more | 1992-10-27 |
| 5151736 | Image forming apparatus with controlled transfer voltage | Yukihiro Ohzeki, Junji Araya, Tatsunori Ishiyama, Yasushi Sato | 1992-09-29 |
| 5084733 | Developing apparatus having developer layer regulation means | Motoi Katoh, Takashi Hino, Michihito Yamazaki, Keiji Okano, Yasushi Sato | 1992-01-28 |
| 5034777 | Transferring device having charging device with double oxide and voltage control | Yukihiro Ohzeki, Koichi Hiroshima, Yoshiaki Nishimura, Jun Murata, Junji Araya +2 more | 1991-07-23 |
| 5027745 | Developing apparatus having developer carrying roller with carbon fibers in surface layer | Michihito Yamazaki, Katsuhiko Nishimura, Keiji Okano, Kouichi Suwa, Yasuhi Sato | 1991-07-02 |
| 5010370 | Transfer apparatus and image bearing apparatus using same having transfer means for contacting a backside of a transfer material | Junji Araya, Yukihiro Ohzeki, Toshio Miyamoto, Koichi Hiroshima, Yasushi Sato | 1991-04-23 |
| 4989044 | Developing apparatus for developing electrostatic latent images | Katsuhiko Nishimura, Michihito Yamazaki, Keiji Okano, Motoi Katoh, Kouichi Suwa +1 more | 1991-01-29 |
| 4958187 | Image forming apparatus for scanning both sides of an original and producing a duplex copy | Hiroaki Tsuchiya | 1990-09-18 |
| 4937630 | Image forming apparatus employing non-magnetic and magnetic toner | Masao Yoshikawa | 1990-06-26 |
| 4872418 | Magnet roll developing apparatus | Masao Yoshikawa | 1989-10-10 |
| 4860048 | Image forming apparatus | Masahiro Itoh, Yoshihiro Murasawa, Atsushi Takeda, Hiroaki Tsuchiya | 1989-08-22 |
| 4766468 | Developing method and apparatus for a photocopier | Nagao Hosono, Haruo Fujii, Yujiro Ando | 1988-08-23 |
| 4739363 | Image forming apparatus | Norihisa Hoshika, Hiroyuki Adachi | 1988-04-19 |
| 4699499 | Image forming apparatus | Norihisa Hoshika, Hiroyuki Adachi | 1987-10-13 |
| 4672505 | Corona discharging device | Hiroaki Tsuchiya | 1987-06-09 |
| 4669852 | Developing apparatus | Hatsuo Tajima, Hidemi Egami, Fumitaka Kan, Atsushi Hosoi | 1987-06-02 |