Issued Patents All Time
Showing 1–25 of 26 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12306572 | Process cartridge | Shintaro Kawaguchi, Masamichi Sato, Masatake Tanaka | 2025-05-20 |
| 12147172 | Developing device, cleaning method, process cartridge and electrophotographic image forming apparatus | Taiji Katsura | 2024-11-19 |
| 11650516 | Developing apparatus, electrophotography process cartridge, and electrophotographic image forming apparatus | Tomoya Uesugi, Kazuaki Nagaoka, Toru Ishii, Akio Nishi, Kentaro Yamawaki +1 more | 2023-05-16 |
| 11465383 | Electrophotographic member, electrophotographic process cartridge and electrophotographic image forming apparatus | Sosuke Yamaguchi, Shohei Urushihara, Kazuaki Nagaoka, Minoru Nakamura | 2022-10-11 |
| 10976683 | Electrophotographic member, electrophotographic process cartridge, and electrophotographic image forming apparatus | Kazutoshi Ishida, Yuji Sakurai, Minoru Nakamura, Toru Ishii, Kenta Matsunaga | 2021-04-13 |
| 10942471 | Electrophotographic member having a surface layer with a cross-linked urethane resin-containing matrix, process cartridge, and apparatus | Yoshinobu Ogawa, Kazuaki Nagaoka, Kenta Matsunaga, Toru Ishii, Hideya Arimura +4 more | 2021-03-09 |
| 10935903 | Developing roller, process cartridge and image forming apparatus | Yuji Sakurai, Kazutoshi Ishida | 2021-03-02 |
| 10895824 | Developing roller, process cartridge and electrophotographic image forming apparatus | Yoshinobu Ogawa, Masashi Uno, Tomoya Uesugi, Kenta Matsunaga, Wataru Moriai | 2021-01-19 |
| 10895823 | Developing roller, process cartridge and electrophotographic image forming apparatus | Masashi Uno, Kenta Matsunaga, Kazuaki Nagaoka | 2021-01-19 |
| 10831127 | Developing member, electrophotographic process cartridge, and electrophotographic image forming apparatus | Fumihiko Utsuno, Minoru Nakamura, Kazuaki Nagaoka | 2020-11-10 |
| 10831126 | Developing roller having crown-shaped electro-conductive layer with outer surface providing electrically insulating first regions adjacent to second regions having higher conductivity | Kenta Matsunaga, Minoru Nakamura, Kazuaki Nagaoka, Masashi Uno, Fumihiko Utsuno | 2020-11-10 |
| 10747140 | Developing apparatus, developer carrying member, process cartridge, and image forming apparatus | Takuya Kitamura, Kenji Shindo, Kazunari Hagiwara, Takahiro Kawamoto | 2020-08-18 |
| 10712684 | Developing roller, electrophotographic process cartridge and electrophotographic image forming apparatus | Kazuhito Wakabayashi, Kazuaki Nagaoka, Kunimasa Kawamura, Minoru Nakamura | 2020-07-14 |
| 10705449 | Developing member, electrophotographic process cartridge, and electrophotographic image forming apparatus | Kazutoshi Ishida, Kazuaki Nagaoka, Minoru Nakamura | 2020-07-07 |
| 10678161 | Electrophotographic member having elastic layer with elastic modulus of 0.5 to 3.0 MPA and coating layer with elastic modulus of 5.0 to 100 MPA | Seiji Tsuru, Noriyuki Doi, Kazuaki Nagaoka, Minoru Nakamura | 2020-06-09 |
| 10642186 | Developing member having outer surface with independent electrically insulating domains, electrophotographic process cartridge, and electrophotographic image forming apparatus | Yuji Sakurai, Minoru Nakamura, Kazutoshi Ishida, Hiroshi Morishita, Kenta Matsunaga +1 more | 2020-05-05 |
| 10635019 | Developing roller, electrophotographic process cartridge and electrophotographic image forming apparatus | Noriyuki Doi, Minoru Nakamura, Seiji Tsuru | 2020-04-28 |
| 10571825 | Electrophotographic member, electrophotographic process cartridge and electrophotographic image forming apparatus | Shohei Urushihara, Kazuaki Nagaoka, Sosuke Yamaguchi, Minoru Nakamura | 2020-02-25 |
| 10310447 | Electrophotographic member, process cartridge, and electrophotographic image forming apparatus | Hiroshi Morishita, Yuji Sakurai, Kazutoshi Ishida, Minoru Nakamura, Toru Ishii +1 more | 2019-06-04 |
| 10078291 | Developing apparatus having a projecting regulating member and process cartridge | Takaaki Shinkawa, Kazuhiro Okubo, Jun Miura, Yoshinobu Ogawa, Mitsuru Okuda | 2018-09-18 |
| 10073374 | Developing apparatus having multi-part regulating member, process cartridge and electrophotographic image forming apparatus | Yoshinobu Ogawa, Mitsuru Okuda | 2018-09-11 |
| 9989883 | Developing apparatus, process cartridge and electrophotographic image forming apparatus | Mitsuru Okuda, Yoshinobu Ogawa | 2018-06-05 |
| 9971276 | Developing member, method of producing developing member, process cartridge, and electrophotographic apparatus | Kazutoshi Ishida, Yuji Sakurai, Rieko Takabe, Sosuke Yamaguchi | 2018-05-15 |
| 9952532 | Developing apparatus, electrophotographic process cartridge, and electrophotographic image forming apparatus | Yuji Sakurai, Yoshinobu Ogawa, Kazutoshi Ishida, Mitsuru Okuda | 2018-04-24 |
| 9921518 | Developing roller, with conductive elastic layer having exposed protrusions, cartridge and apparatus | Yuji Sakurai, Kazutoshi Ishida, Rieko Takabe | 2018-03-20 |