Issued Patents All Time
Showing 26–50 of 59 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5557375 | Contact type charging device and image forming apparatus having the same | Keiko Nagayasu, Isao Doi, Masashi Yamamoto | 1996-09-17 |
| 5552865 | Charging device and method for charging a charge-receiving member by a charging member by discharge therebetween based on difference in electric potential between the charging member and the charge-receiving member | Izumi Osawa, Shuji Iino, Masaki Asano | 1996-09-03 |
| 5504561 | Contact charger and image forming apparatus provided with same | Keiko Nagayasu, Masaki Asano, Masashi Yamamoto | 1996-04-02 |
| 5489973 | An electrically conductive member of an image forming apparatus containing an impurity atom | Masaki Asano, Noriko Yoshida, Shuji Iino, Izumi Osawa, Kenzo Tanaka | 1996-02-06 |
| 5402213 | Charging device for charging outer surface of photosensitive member including charging member formed by a layer comprising a copolymer of an olefin-type vinyl monomer and a fluorine-contained monomer | Masaki Asano, Keiko Nagayasu, Masashi Yamamoto | 1995-03-28 |
| 5376995 | Contact charger having a curved surface | Masashi Yamamoto, Masaki Asano, Keiko Nagayasu | 1994-12-27 |
| 5376425 | Contact member for controlling an electrostatic state of a chargeable member | Masaki Asano, Shuji Iino, Izumi Osawa, Kenzo Tanaka | 1994-12-27 |
| 5371578 | Image forming apparatus including means for removing counter charged toner from the charging means | Masaki Asano, Shuji Iino, Izumi Osawa | 1994-12-06 |
| 5343223 | Image forming apparatus | Yoshio Tohyama, Takayuki Ogawa, Tatsuya Eguchi, Norio Tamada, Satoshi Yoshida +6 more | 1994-08-30 |
| 5338895 | Developing apparatus | Kouichi Aritomo, Kazuki Tsukamoto, Michiya Yamashita | 1994-08-16 |
| 5328790 | Photoreceptor for use in contact charging method and image forming apparatus employing said photoreceptor | Masaki Asano, Shuji Iino, Izumi Osawa | 1994-07-12 |
| 5305061 | Image forming apparatus having a contact charging device that exhibits uniform charging through reduced residual toner adhesion | Masaaki Takama, Junji Machida | 1994-04-19 |
| 5289234 | Image forming apparatus with charge brush | Masaki Asano, Shuji Iino, Izumi Osawa | 1994-02-22 |
| 5278614 | Contact charger and image forming apparatus incorporating the contact charger | Masaki Asano, Shuji Iino, Izumi Osawa | 1994-01-11 |
| 5245386 | Contact charging device having a brush restricting member | Masaki Asano, Shuji Iino, Izumi Osawa | 1993-09-14 |
| 5243387 | Charging device with a loosely mounted flexible member | — | 1993-09-07 |
| 5241342 | Image forming apparatus having a charging member and means for protecting the image bearing surface charged by the charging member | Masaki Asano, Shuji Iino, Izumi Osawa | 1993-08-31 |
| 5225878 | Image forming apparatus | Masaki Asano, Shuji Iino, Izumi Osawa | 1993-07-06 |
| 5192974 | Contract charger | Masaki Asano, Shuji Iino, Izumi Osawa | 1993-03-09 |
| 5140373 | Electrostatic latent image developing apparatus with bristle height adjusting member | Hiroshi Mizuno, Hiroshi Murasaki, Kouichi Etou | 1992-08-18 |
| 5130755 | Cleaning device | Toshiya Natushara, Hiroshi Mizuno, Yuji Enoguchi | 1992-07-14 |
| 5128722 | Developing device excellent in toner transportability | Toshiya Natsuhara, Hiroshi Mizuno, Yuji Enoguchi | 1992-07-07 |
| 5124757 | Image forming method and apparatus including treatment and collection of residual developer | — | 1992-06-23 |
| 5061963 | Monocomponent developing device | Yuji Enoguchi, Hiroshi Mizuno, Toshiya Natsuhara, Masashi Yamamoto | 1991-10-29 |
| 5012285 | Developing apparatus including a partitioning arrangement for partitioning the toner accommodating tank | Tateki Oka, Naoki Toyoshi, Tomoaki Yokoyama, Hiroshi Mizuno, Hiroshi Murasaki +2 more | 1991-04-30 |