Issued Patents All Time
Showing 1–25 of 73 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6287374 | Pigment and process for producing the same, water base ink and process for producing the same | Shozo Yanagida, Yuji Wada, Miwa SAITO, Takamasa Ueda | 2001-09-11 |
| 6145966 | Ink jet recording head | Hideo Hotomi | 2000-11-14 |
| 5623716 | Process for image forming using a photosensitive member having an amorphous carbon layer as an outermost surface layer | Kenji Masaki, Seishi Ojima | 1997-04-22 |
| 5576807 | Image forming apparatus having a contact type charging device | Kazuko Taniguchi, Masashi Yamamoto | 1996-11-19 |
| 5572294 | Contact charger and image forming apparatus provided with same | Isao Doi, Seishi Ojima, Yoshihiro Uchimoto | 1996-11-05 |
| 5568231 | Charging device for charging the surface of a photosensitive member in an electrophotographic image forming device | Masaki Asano, Shuji Iino, Akihito Ikegawa | 1996-10-22 |
| 5557372 | Contact charger and image forming apparatus provided with same | Seishi Ojima, Isao Doi | 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 | Akihito Ikegawa, Shuji Iino, Masaki Asano | 1996-09-03 |
| 5536610 | Photosensitive member having surface protective layer with specified optical properties | Seishi Ojima, Kenji Masaki, Takeshi Kakutani, Toshiyuki Kobayashi, Isao Doi | 1996-07-16 |
| 5504560 | Photosensitive member-protective shutter | Yasunari Kitagaki, Seishi Ojima, Kenji Masaki | 1996-04-02 |
| 5504559 | Method for image formation | Seishi Ojima | 1996-04-02 |
| 5489973 | An electrically conductive member of an image forming apparatus containing an impurity atom | Masaki Asano, Noriko Yoshida, Shuji Iino, Akihito Ikegawa, Kenzo Tanaka | 1996-02-06 |
| 5396317 | Magnetic particle-containing member for use in copying machine | Kenji Masaki, Isao Doi, Shuji Iino | 1995-03-07 |
| 5376425 | Contact member for controlling an electrostatic state of a chargeable member | Masaki Asano, Shuji Iino, Akihito Ikegawa, Kenzo Tanaka | 1994-12-27 |
| 5371578 | Image forming apparatus including means for removing counter charged toner from the charging means | Masaki Asano, Shuji Iino, Akihito Ikegawa | 1994-12-06 |
| 5330873 | Production method of photosensitive member by eliminating outermost surface portion of photosensitive layer | Isao Doi, Kenji Masaki, Shuji Iino | 1994-07-19 |
| 5328790 | Photoreceptor for use in contact charging method and image forming apparatus employing said photoreceptor | Masaki Asano, Shuji Iino, Akihito Ikegawa | 1994-07-12 |
| 5308727 | Photosensitive member excellent in antioxidation | Isao Doi | 1994-05-03 |
| 5289234 | Image forming apparatus with charge brush | Masaki Asano, Shuji Iino, Akihito Ikegawa | 1994-02-22 |
| 5278614 | Contact charger and image forming apparatus incorporating the contact charger | Akihito Ikegawa, Masaki Asano, Shuji Iino | 1994-01-11 |
| 5245386 | Contact charging device having a brush restricting member | Masaki Asano, Shuji Iino, Akihito Ikegawa | 1993-09-14 |
| 5242773 | Photosensitive member having fine cracks in surface protective layer | Shuji Iino, Kenji Masaki, Seishi Ojima, Isao Doi | 1993-09-07 |
| 5242776 | Organic photosensitive member having fine irregularities on its surface | Isao Doi, Seishi Ojima, Kenji Masaki, Shuji Iino | 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, Akihito Ikegawa | 1993-08-31 |
| 5232799 | Organic photosensitive member comprising a binder resin and a solvent | Shuji Iino, Isao Doi, Kenji Masaki | 1993-08-03 |