Issued Patents All Time
Showing 1–25 of 44 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12339617 | Drum cartridge in which first storage medium of toner cartridge and second storage medium of drum cartridge are aligned in mounting direction, and image forming apparatus to which drum cartridge is mountable | — | 2025-06-24 |
| 11789405 | Drum cartridge in which first storage medium of toner cartridge and second storage medium of drum cartridge are aligned in mounting direction, and image forming apparatus to which drum cartridge is mountable | — | 2023-10-17 |
| 11556089 | Image forming apparatus | Hiroshi Nakano, Kotaro Haruta | 2023-01-17 |
| 11429062 | Image forming apparatus with plural moving mechanisms for developing rollers | Kotaro Haruta, Shoichiro Nishimura, Tomonori Watanabe | 2022-08-30 |
| 11372362 | Image forming apparatus including cam having compact structure capable of detection of contact state and separated state of developing roller relative to photosensitive drum | Yusuke Ikegami, Toshiyuki Sano, Shintaro Sakaguchi | 2022-06-28 |
| 11353806 | Image forming apparatus configured to stop conveyance of sheet for prescribed time period before conveying sheet to photosensitive drum when sheet is fed from first tray | Shintaro Sakaguchi, Toshiyuki Sano | 2022-06-07 |
| 11334022 | Image forming apparatus including common drive source for driving developing roller and cam that moves developing roller toward and away from photosensitive drum | Yusuke Ikegami, Shintaro Sakaguchi, Toshiyuki Sano | 2022-05-17 |
| 11237497 | Image forming apparatus including multiple photosensitive drums and multiple developing rollers | Shintaro Sakaguchi, Toshiyuki Sano | 2022-02-01 |
| 11221585 | Drum cartridge in which first storage medium of toner cartridge and second storage medium of drum cartridge are aligned in mounting direction, and image forming apparatus to which drum cartridge is mountable | — | 2022-01-11 |
| 11209744 | Image forming apparatus having cartridge and exposure device | Toshiyuki Sano, Shintaro Sakaguchi, Kotaro Haruta, Shoichiro Nishimura | 2021-12-28 |
| 11181857 | Image forming apparatus moving developing rollers toward and away from corresponding photosensitive drums based on sheet interval between two sheets | Yusuke Ikegami, Toshiyuki Sano, Shintaro Sakaguchi | 2021-11-23 |
| 11144001 | Image forming apparatus having moving mechanisms to move developing rollers to be in contact with and separated from photosensitive drums | Shintaro Sakaguchi, Toshiyuki Sano | 2021-10-12 |
| 11143985 | Image forming apparatus including first and second cams whose rotation angles are offset, and first and second rods that move, by rotations of first and second cams, first and second developing rollers toward and away from first and second photosensitive drums, respectively | — | 2021-10-12 |
| 11137718 | Image-forming apparatus capable of moving developing roller between contact position in contact with photosensitive drum and separated position away therefrom | Yusuke Ikegami, Toshiyuki Sano, Shintaro Sakaguchi | 2021-10-05 |
| 11106155 | Image-forming apparatus with reduced number of motors for moving developing rollers and altering rotation speed ratio of developing rollers to photosensitive drums | Shintaro Sakaguchi, Toshiyuki Sano | 2021-08-31 |
| 11079714 | Image forming apparatus including common drive source for driving developing roller and cam that moves developing roller toward and away from photosensitive drum | Yusuke Ikegami, Shintaro Sakaguchi, Toshiyuki Sano | 2021-08-03 |
| 11061357 | Image forming apparatus with rotation-controllable photosensitive drum and movable developing roller | Kazuaki Ooka, Keigo Nakajima | 2021-07-13 |
| 11009806 | Image-forming apparatus including cam and cam follower for moving developing roller toward and away from photosensitive drum | Toshiyuki Sano, Shintaro Sakaguchi | 2021-05-18 |
| 10990032 | Image-forming apparatus capable of controlling separation/contact timing between developing rollers and photosensitive drums in timed relation to sheet conveyance | Shintaro Sakaguchi, Toshiyuki Sano | 2021-04-27 |
| 10969737 | Image forming apparatus and method for ensuring adequate torque of development motor and suppressing reduction in printing speed in low-temperature environment | Kotaro Haruta, Shintaro Sakaguchi | 2021-04-06 |
| 10955791 | Image forming apparatus | Hiroshi Nakano, Kotaro Haruta | 2021-03-23 |
| 10955790 | Image forming apparatus | Shintaro Sakaguchi, Toshiyuki Sano | 2021-03-23 |
| 10921748 | Image forming apparatus with roller-drivable mechanism, roller-movable mechanism, and nipping-force adjustable mechanism | Kotaro Haruta, Shoichiro Nishimura, Tomonori Watanabe | 2021-02-16 |
| 10859940 | Image forming apparatus with developing cartridges having increased toner capacities and reducible of contact duration between developing rollers and photosensitive drums | Toshiyuki Sano, Shintaro Sakaguchi, Kotaro Haruta, Shoichiro Nishimura | 2020-12-08 |
| 10712711 | Drum cartridge in which first storage medium of toner catridge and second storage medium of drum catridge are aligned in mounting direction, and image forming apparatus to which drum catridge is mountable | — | 2020-07-14 |