Issued Patents All Time
Showing 26–50 of 137 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6832056 | Memory member, unit, process cartridge and electrophotographic image forming apparatus | Yoshihiro Ito, Toshiyuki Karakama | 2004-12-14 |
| 6804483 | Electrophotographic image forming apparatus and process cartridges | Akiyoshi Yokoi, Toshiyuki Karakama, Toru Oguma | 2004-10-12 |
| 6782213 | Memory member, unit, process cartridge and electrophotographic image forming apparatus | Yoshihiro Ito, Toshiyuki Karakama | 2004-08-24 |
| 6782222 | Image forming apparatus and process cartridge mountable therein in which a gap exists between a main assembly antenna of the apparatus and a memory antenna of the process cartridge mounted thereon | Yoshihiro Ito, Toshiyuki Karakama | 2004-08-24 |
| 6738589 | Process cartridge including convex and concave portions and electrophotographic image forming apparatus to which such a process cartridge is detachably mountable | Toshiyuki Karakama | 2004-05-18 |
| 6704525 | Developing device, process cartridge and electrophotographic image forming apparatus | Toru Oguma, Toshiyuki Karakama, Akiyoshi Yokoi | 2004-03-09 |
| 6701107 | Memory member, unit, process cartridge and electrophotographic image forming apparatus | Toshiyuki Karakama, Yoshihiro Ito | 2004-03-02 |
| 6701106 | Cartridge having developer containing portion with inner pressure regulating function | Akiyoshi Yokoi | 2004-03-02 |
| 6697578 | Memory member, unit, process cartridge and electrophotographic image forming apparatus | Yoshihiro Ito, Toshiyuki Karakama | 2004-02-24 |
| 6684040 | Developing device, process cartridge, electrophotographic image forming apparatus, and developer container and method of assembling the developer container | Akiyoshi Yokoi, Toru Oguma | 2004-01-27 |
| 6658224 | Process cartridge and electrophotographic image forming apparatus | Akiyoshi Yokoi, Toshiyuki Karakama, Toru Oguma | 2003-12-02 |
| 6654567 | Process cartridge detachable from electrophotographic image forming apparatus having wireless communication | Toshiyuki Karakama, Yoshihiro Ito | 2003-11-25 |
| 6642728 | Holder of electroconductive contactor, and method for producing the same | Masami Kudo, Toshio Kazama, Yoshio Yamada | 2003-11-04 |
| 6625413 | Developing device, process cartridge and electrophotographic image forming apparatus | Toru Oguma, Toshiyuki Karakama, Akiyoshi Yokoi | 2003-09-23 |
| 6606469 | Developing apparatus mounted on image forming apparatus | Ken Kikuchi, Toru Oguma, Akiyoshi Yokoi | 2003-08-12 |
| 6594454 | Electric contact member and developing device, process cartridge, and electrophotographic image-forming apparatus using the electric contact member | Toru Oguma, Toshiyuki Karakama | 2003-07-15 |
| 6571070 | Process cartridge and image forming apparatus | Toru Oguma, Akiyoshi Yokoi | 2003-05-27 |
| 6501926 | Process cartridge and electrophotographic image forming apparatus | Yoshihiro Ito, Toshiharu Kawai | 2002-12-31 |
| 6501927 | Process cartridge and photosensitive drum driving mount | Yoshihiro Ito, Toshiharu Kawai | 2002-12-31 |
| 6408143 | Electrophotographic image forming apparatus | Kazushige Sakurai, Toshiyuki Karakama, Hideki Matsumoto | 2002-06-18 |
| 6400914 | Coupling part, photosensitive drum, process cartridge and electrophotographic image forming apparatus | Shinya Noda, Shinichi Sasaki, Akihiro Toma, Isao Ikemoto, Akira Higeta | 2002-06-04 |
| 6397018 | Developer amount detecting method, developing device, process cartridge and electrophotographic image forming apparatus | Hideki Matsumoto, Kazushige Sakurai, Isao Ikemoto, Toshiyuki Karakama | 2002-05-28 |
| 6397017 | Developer amount detecting method, developing device, process cartridge and electrophotographic image forming apparatus | Hiroaki Sakai, Toshiyuki Karakama, Masaru Shimura, Hideki Matsumoto, Seiji Saito | 2002-05-28 |
| 6377759 | Process cartridge, electrophotographic image forming apparatus and developer amount detecting member | Daisuke Abe, Toru Oguma, Takao Nakagawa | 2002-04-23 |
| 6349188 | Process cartridge, electrophotographic image forming apparatus, driving force transmission part and electrophotographic photosensitive drum | Toshiharu Kawai, Yoshihiro Ito | 2002-02-19 |