Issued Patents All Time
Showing 1–20 of 20 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12416881 | Image forming apparatus | Shuichi Tetsuno, Shinji Katagiri, Koji An, Hiroko Yokoyama, Wataru Takahashi +2 more | 2025-09-16 |
| 12298685 | Image forming apparatus for maintaining cleaning performance while preventing turn-over of a contact member | Keisuke Ishizumi | 2025-05-13 |
| 12061434 | Image forming apparatus to reduce or suppress leakage of toner | — | 2024-08-13 |
| 12038697 | Image forming apparatus | Keisuke Ishizumi, Shinji Katagiri | 2024-07-16 |
| 11846899 | Image forming apparatus | Shuichi Tetsuno, Shinji Katagiri, Koji An, Hiroko Yokoyama, Wataru Takahashi +2 more | 2023-12-19 |
| 11656564 | Image forming apparatus which includes a belt having an electroconductive layer | Keisuke Ishizumi, Shinji Katagiri, Eiichi Hamana, Noriaki Egawa | 2023-05-23 |
| 11537066 | Image forming apparatus | Keisuke Ishizumi, Shinji Katagiri, Takayuki Tanaka, Tsuguhiro Yoshida, Shuichi Tetsuno | 2022-12-27 |
| 11435680 | Image forming apparatus which includes a belt having an electroconductive layer | Keisuke Ishizumi, Shinji Katagiri, Eiichi Hamana, Noriaki Egawa | 2022-09-06 |
| 11392075 | Image-forming apparatus which controls the rotation of the intermediate transfer belt based on accumulated toner | Keisuke Ishizumi, Shinji Katagiri | 2022-07-19 |
| 11366411 | Image forming apparatus | Keisuke Ishizumi, Takayuki Tanaka, Hiroomi Kojima | 2022-06-21 |
| 11327429 | Image-forming apparatus with a durable contact member that abuts against a belt | Keisuke Ishizumi, Shinji Katagiri | 2022-05-10 |
| 11262673 | Image forming apparatus | Keisuke Ishizumi, Shinji Katagiri, Takayuki Tanaka, Tsuguhiro Yoshida, Shuichi Tetsuno | 2022-03-01 |
| 11209767 | Image-forming apparatus | Keisuke Ishizumi, Shinji Katagiri, Wataru Takahashi | 2021-12-28 |
| 11209766 | Cleaning device and image forming apparatus | Yuichiro Inaba, Norihiro Matsumoto, Keisuke Ishizumi, Shinji Katagiri | 2021-12-28 |
| 10725402 | Image forming apparatus | Keisuke Ishizumi, Shinji Katagiri, Takayuki Tanaka, Tsuguhiro Yoshida, Shuichi Tetsuno | 2020-07-28 |
| 10656566 | Image forming apparatus using contact member to recover toner remaining on intermediate transfer member | Takayuki Tanaka, Keisuke Ishizumi, Tsuguhiro Yoshida | 2020-05-19 |
| 10642195 | Image forming apparatus using intermediate transfer member having grooves and specified dynamic friction coefficient | Keisuke Ishizumi, Takayuki Tanaka, Tsuguhiro Yoshida, Shinji Katagiri | 2020-05-05 |
| 10459361 | Image forming apparatus with voltage adjustment member | Seiji Saito, Keisuke Ishizumi, Toshihiko Takayama, Masaru Ohno, Shingo Ito +3 more | 2019-10-29 |
| 10216119 | Image forming apparatus with adjustment of potential for secondary transfer | Keisuke Ishizumi, Seiji Saito, Toshihiko Takayama, Masaru Ohno, Shingo Ito | 2019-02-26 |
| 10197940 | Image forming apparatus changing magnitude of control signal used for image formation | Shingo Ito, Toshihiko Takayama, Keisuke Ishizumi, Kenichi Iida | 2019-02-05 |