Issued Patents All Time
Showing 26–47 of 47 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6301459 | Charging apparatus with first and second charging members | Harumi Ishiyama, Yasushi Sato, Hideyuki Yano, Tadashi Furuya, Seiji Mashimo | 2001-10-09 |
| 6298205 | Charging apparatus which stores electrically conductive particles in granule form | Harumi Ishiyama, Jun Hirabayashi | 2001-10-02 |
| 6233419 | Charging device and image forming apparatus | Harumi Ishiyama, Jun Hirabayashi | 2001-05-15 |
| 6226480 | Image forming apparatus supplying charging accelerating particles to image bearing body in non-image forming | Jun Hirabayashi, Harumi Ishiyama | 2001-05-01 |
| 6212346 | Charging member for holding electrically conductive particles in cells | Jun Hirabayashi, Harumi Ishiyama | 2001-04-03 |
| 6173144 | Image forming apparatus which supplies image bearing member with electrically conductive particles during development | Jun Hirabayashi, Harumi Ishiyama, 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, Jun Hirabayashi | 2000-12-19 |
| 6134407 | Charging apparatus for charging a moving member to be charged including an elastic rotatable member carrying electroconductive particles on the surface thereof | Harumi Ishiyama, Yukio Nagase, Jun Hirabayashi | 2000-10-17 |
| 6128456 | Image forming apparatus having a charging member applying an electric charge through electrically conductive or electroconductive particles to the surface of a photosensitive or image bearing member | Yukio Nagase, Harumi Ishiyama, Jun Hirabayashi | 2000-10-03 |
| 6118965 | Image forming apparatus having a contact-type charger | Jun Hirabayashi, Harumi Ishiyama | 2000-09-12 |
| 6081681 | Charging device, charging method, process cartridge and image forming apparatus | Yukio Nagase, Harumi Ishiyama, Jun Hirabayashi | 2000-06-27 |
| 6061539 | Charging member, charging device and image forming apparatus | Harumi Ishiyama, Yasushi Sato, Hideyuki Yano, Tadashi Furuya, Seiji Mashimo | 2000-05-09 |
| 6038420 | Charging device, charging method and image forming apparatus | Jun Hirabayashi, Harumi Ishiyama | 2000-03-14 |
| 6038418 | Charging method and a charging device for charging a member to be charged by a flexible charging member | Harumi Ishiyama, Jun Hirabayashi | 2000-03-14 |
| 6035162 | Charging device and image forming apparatus | — | 2000-03-07 |
| 5774769 | Charging apparatus and image forming apparatus | Jun Hirabayashi | 1998-06-30 |
| 5754927 | Magnetic charging brush having particular magnetic fields | Harumi Ishiyama, Tadashi Furuya, Takeo Yamamoto, Seiji Mashimo | 1998-05-19 |
| 5734390 | Image forming apparatus | Katsuhiro Sakaizawa, Noboru Koumura, Yasushi Sato, Yukihide Ushio, Izumi Narita +5 more | 1998-03-31 |
| 5729785 | Image forming apparatus with ink jet and electrophotographic image forming means | Katsuhiro Sakaizawa, Yasushi Sato, Yukihiro Ohzeki, Kenya Ogawa | 1998-03-17 |
| 5729802 | Contact charger for charging a photosensitive member | Jun Hirabayashi, Nobuyuki Ito, Harumi Ishiyama, Tadashi Furuya, Seiji Mashimo | 1998-03-17 |
| 5659852 | Image forming method, image forming apparatus and process cartridge | Harumi Ishiyama, Tadashi Furuya, Seiji Mashimo | 1997-08-19 |
| 5570451 | Image forming apparatus including plural image forming means and plural recording medium transport passages | Katsuhiro Sakaizawa, Yasushi Satoh, Yukihiro Ohzeki | 1996-10-29 |