Issued Patents All Time
Showing 1–23 of 23 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12366816 | Electrophotographic member, process cartridge, and electrophotographic image forming apparatus | Ayumi Sasaki | 2025-07-22 |
| 12164242 | Developing roller, process cartridge, and electrophotographic image forming apparatus | Toru Ishii | 2024-12-10 |
| 12158724 | Electrophotographic member, process cartridge, and electrophotographic image forming apparatus | Akio Nishi, Toru Ishii, Tomoya Uesugi | 2024-12-03 |
| 11841629 | Developing roller, process cartridge, and electrophotographic image forming apparatus | Toru Ishii | 2023-12-12 |
| 11650516 | Developing apparatus, electrophotography process cartridge, and electrophotographic image forming apparatus | Tomoya Uesugi, Toru Ishii, Ryo Sugiyama, Akio Nishi, Kentaro Yamawaki +1 more | 2023-05-16 |
| 11520249 | Electrophotographic member, electrophotographic process cartridge, and electrophotographic image forming apparatus | Toru Ishii | 2022-12-06 |
| 11465383 | Electrophotographic member, electrophotographic process cartridge and electrophotographic image forming apparatus | Sosuke Yamaguchi, Shohei Urushihara, Ryo Sugiyama, Minoru Nakamura | 2022-10-11 |
| 10942471 | Electrophotographic member having a surface layer with a cross-linked urethane resin-containing matrix, process cartridge, and apparatus | Yoshinobu Ogawa, Ryo Sugiyama, Kenta Matsunaga, Toru Ishii, Hideya Arimura +4 more | 2021-03-09 |
| 10895823 | Developing roller, process cartridge and electrophotographic image forming apparatus | Masashi Uno, Ryo Sugiyama, Kenta Matsunaga | 2021-01-19 |
| 10831127 | Developing member, electrophotographic process cartridge, and electrophotographic image forming apparatus | Fumihiko Utsuno, Minoru Nakamura, Ryo Sugiyama | 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, Ryo Sugiyama, Masashi Uno, Fumihiko Utsuno | 2020-11-10 |
| 10712684 | Developing roller, electrophotographic process cartridge and electrophotographic image forming apparatus | Kazuhito Wakabayashi, Ryo Sugiyama, Kunimasa Kawamura, Minoru Nakamura | 2020-07-14 |
| 10705449 | Developing member, electrophotographic process cartridge, and electrophotographic image forming apparatus | Kazutoshi Ishida, Minoru Nakamura, Ryo Sugiyama | 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, Ryo Sugiyama, Minoru Nakamura | 2020-06-09 |
| 10571825 | Electrophotographic member, electrophotographic process cartridge and electrophotographic image forming apparatus | Shohei Urushihara, Sosuke Yamaguchi, Ryo Sugiyama, Minoru Nakamura | 2020-02-25 |
| 9846407 | Developing member, process cartridge and electrophotographic image forming apparatus | Minoru Nakamura, Yuto Miyauchi | 2017-12-19 |
| 9625854 | Developer carrying member, electrophotographic process cartridge, and electrophotographic image forming apparatus | Takashi Koyanagi, Minoru Nakamura, Seiji Tsuru, Yuto Miyauchi | 2017-04-18 |
| 9164416 | Conductive member, electrophotographic process cartridge, and electrophotographic apparatus | Minoru Nakamura, Yosuke Ata, Masahiro Inami | 2015-10-20 |
| 8745870 | Regenerated elastic roller manufacturing process, regenerated elastic roller, electropohotographic process cartridge, and electropohotographic image forming apparatus | Kunimasa Kawamura, Masahiro Watanabe | 2014-06-10 |
| 8176632 | Regenerated elastic roller manufacturing process, regenerated elastic roller, electrophotographic process cartridge, and electrophotographic image forming apparatus | Kunimasa Kawamura, Masahiro Watanabe | 2012-05-15 |
| 7881646 | Developing roller and manufacturing method thereof, process cartridge and electrophotographic image forming apparatus | Minoru Nakamura, Yoshiyuki Takayama | 2011-02-01 |
| 7797833 | Developing roller and method of producing the roller, process cartridge, and electrophotographic image-forming apparatus | Minoru Nakamura, Yoshiyuki Takayama, Masaki Yamada | 2010-09-21 |
| 7727134 | Developing roller, process for its production, developing assembly and image forming apparatus | Minoru Nakamura, Masahiro Watanabe, Hidenori Satoh | 2010-06-01 |