Issued Patents All Time
Showing 51–75 of 85 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7116922 | Charging apparatus | Norio Takahashi, Harumi Ishiyama | 2006-10-03 |
| 6904253 | Charging member having an elastic foam member including cell portions whose gap ratio is 5% to 50%, charging apparatus, process cartridge, and image forming apparatus having such charging member | Takahiro Hosokawa, Harumi Ishiyama, Yasunori Chigono | 2005-06-07 |
| 6839530 | Image forming apparatus with image bearing member particle collection using timed voltage application to the apparatus developing unit | Norio Takahashi | 2005-01-04 |
| 6832062 | Charging apparatus, process cartridge and image forming apparatus having electroconductive particles charged in a nip between a charging member and a member to be charged | Harumi Ishiyama, Yasunori Chigono, Norio Takahashi | 2004-12-14 |
| 6788911 | Charging apparatus, process cartridge and image forming apparatus | Harumi Ishiyama, Yasunori Chigono | 2004-09-07 |
| 6781304 | EL panel | Yoshihiko Yano, Katsuto Nagano, Mutsuko Nakano | 2004-08-24 |
| 6614460 | Thermal head and method of manufacturing the same | Masato Susukida, Katsuto Nagano, Yoshio Saita, Jun Hagiwara | 2003-09-02 |
| 6615010 | Electrifier for charging developer carrying member using charge particles, including charge rotary member and nip forming member having bias polarity the same as developer polarity | Harumi Ishiyama, Yasunori Chigono | 2003-09-02 |
| 6580889 | IMAGE FORMING APPARATUS HAVING A MEMBER TO BE CHARGED, INJECTION CHARGING MEANS HAVING AN ELASTIC MEMBER FOR PRESS-CONTACTING THE MEMBER TO BE CHARGED, AND ELECTROCONDUCTIVE PARTICLES BETWEEN THE ELASTIC MEMBER AND THE MEMBER TO BE CHARGED | Harumi Ishiyama, Yukio Nagase, Yasunori Chigono | 2003-06-17 |
| 6553199 | Charging device, process cartridge and image forming apparatus | Harumi Ishiyama, Yasunori Chigono | 2003-04-22 |
| 6549742 | Charging apparatus employing charging particles, and image forming apparatus employing such a charging apparatus | Yasunori Chigono, Harumi Ishiyama, Norio Takahashi | 2003-04-15 |
| 6519433 | Image forming apparatus in which electroconductive particles are supplied to charging means from developing device by way of image bearing member | Harumi Ishiyama, Yasunori Chigono | 2003-02-11 |
| 6473582 | Contact-type charging device having a plurality of projections over the surface of the charging device | Harumi Ishiyama, Yasunori Chigono | 2002-10-29 |
| 6466758 | Developing apparatus having foreign matter accumulating space | Yasunori Chigono, Harumi Ishiyama | 2002-10-15 |
| 6442362 | Image forming apparatus for making recovery and restoration of toners by electrical conductive member | Harumi Ishiyama, Yasunori Chigono | 2002-08-27 |
| 6407764 | Thermal head and method of manufacturing the same | Masato Susukida, Katsuto Nagano, Atsushi Yoshida, Yoshio Saita, Jun Hagiwara | 2002-06-18 |
| 6389254 | Charging member holding charge accelerating particles in a continuous bubble | Harumi Ishiyama, Yasunori Chigono | 2002-05-14 |
| 6344868 | Thermal head and method of manufacturing the same | Masato Susukida, Katsuto Nagano, Yoshio Saita, Jun Hagiwara, Atsushi Yoshida | 2002-02-05 |
| 6298205 | Charging apparatus which stores electrically conductive particles in granule form | Yasunori Chigono, Harumi Ishiyama | 2001-10-02 |
| 6233419 | Charging device and image forming apparatus | Yasunori Chigono, Harumi Ishiyama | 2001-05-15 |
| 6226480 | Image forming apparatus supplying charging accelerating particles to image bearing body in non-image forming | Harumi Ishiyama, Yasunori Chigono | 2001-05-01 |
| 6212346 | Charging member for holding electrically conductive particles in cells | Harumi Ishiyama, Yasunori Chigono | 2001-04-03 |
| 6184913 | Thermal head and method of manufacturing the same | Katsuto Nagano, Masato Susukida, Yoshio Saita, Jun Hagiwara | 2001-02-06 |
| 6173144 | Image forming apparatus which supplies image bearing member with electrically conductive particles during development | Harumi Ishiyama, Yasunori Chigono, Seiichi Shinohara | 2001-01-09 |
| 6163671 | Contact charger having charging performance enhancing particles existing at a contact portion between the contact charger and the member to be charged | Harumi Ishiyama, Yasunori Chigono | 2000-12-19 |