Issued Patents All Time
Showing 1–25 of 51 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8442414 | Seal member, developing device, process cartridge, and image forming apparatus | Tomohiro Kubota, Tomofumi Yoshida, Hirobumi Ooyoshi, Yoshihiro Kawakami, Yoshiyuki Shimizu | 2013-05-14 |
| 8275285 | Process cartridge and image forming apparatus | Yoshihiro Kawakami, Koji Kato, Hirobumi Ooyoshi, Tomofumi Yoshida, Yoshiyuki Shimizu +1 more | 2012-09-25 |
| 8260186 | Toner cartridge with refillable fresh and residual toner chambers, process cartridge, and method of making toner cartridge reusable | Tomohiro Kubota, Tomofumi Yoshida, Hirobumi Ooyoshi, Yoshiyuki Shimizu, Yoshihiro Kawakami +2 more | 2012-09-04 |
| 8208832 | Toner-collecting device and image forming apparatus | Tomofumi Yoshida, Hirobumi Ooyoshi, Yoshihiro Kawakami, Yoshiyuki Shimizu, Tomohiro Kubota +1 more | 2012-06-26 |
| 8160476 | Latent image carrier having pairs of first and second positioning protrusions and image forming apparatus | Yoshiyuki Shimizu, Yoshihiro Kawakami, Tomohiro Kubota, Koji Kato, Hirobumi Ooyoshi +1 more | 2012-04-17 |
| 8135329 | Toner conveyer device, process cartridge, and image forming apparatus | Yoshiyuki Shimizu, Tomofumi Yoshida, Hirobumi Ooyoshi, Koji Kato, Yoshihiro Kawakami +1 more | 2012-03-13 |
| 8135313 | Powder transport screw, and development device, process unit and image-forming apparatus comprising this powder transport screw | Tomofumi Yoshida, Hirobumi Ooyoshi, Tomohiro Kubota, Yoshiyuki Shimizu, Yoshihiro Kawakami +2 more | 2012-03-13 |
| 8103195 | Toner agitating unit, toner hopper, process cartridge, and image forming apparatus | Tomofumi Yoshida, Hirobumi Ooyoshi, Yoshihiro Kawakami, Yoshiyuki Shimizu, Tomohiro Kubota +1 more | 2012-01-24 |
| 8095035 | Developing device, process unit, and image forming apparatus, with supporting members, grooves, and supported developing roller | Hirobumi Ooyoshi, Osamu Saito, Yoshihiro Kawakami, Tomohiro Kubota, Yoshiyuki Shimizu +1 more | 2012-01-10 |
| 8081897 | Seal member, developing device, process cartridge, and image forming apparatus | Tomohiro Kubota, Tomofumi Yoshida, Hirobumi Ooyoshi, Yoshihiro Kawakami, Yoshiyuki Shimizu | 2011-12-20 |
| 8068770 | Toner cartridge, image forming apparatus, method of recycling toner cartridge | Takeroh Kurenuma, Fumio Ogata, Seiji Terazawa, Masayuki Yamane, Kiyonori Tsuda +4 more | 2011-11-29 |
| 8019254 | Toner conveying device, process cartridge, and image forming apparatus | Koji Kato, Hirobumi Ooyoshi, Tomofumi Yoshida, Yoshihiro Kawakami, Yoshiyuki Shimizu +1 more | 2011-09-13 |
| 7979013 | Developing device of image forming apparatus | Tomofumi Yoshida, Hirobumi Ooyoshi, Yoshihiro Kawakami, Yoshiyuki Shimizu, Tomohiro Kubota | 2011-07-12 |
| 7965958 | Developing device, process cartridge and image forming apparatus | Yoshihiro Kawakami, Yoshiyuki Shimizu, Tomohiro Kubota, Hirobumi Ooyoshi, Tomofumi Yoshida +1 more | 2011-06-21 |
| 7965957 | Developing device and image forming apparatus that uses this developing device | Tomohiro Kubota, Yoshihiro Kawakami, Yoshiyuki Shimizu, Hirobumi Ooyoshi, Tomofumi Yoshida +1 more | 2011-06-21 |
| 7962069 | Toner container, image forming apparatus, method of recycling toner container | Takeroh Kurenuma, Fumio Ogata, Seiji Terazawa, Masayuki Yamane, Kiyonori Tsuda +4 more | 2011-06-14 |
| 7945203 | Waste-toner collecting device, process cartridge, and image forming apparatus | Yoshiyuki Shimizu, Hirobumi Ooyoshi, Yoshihiro Kawakami, Tomofumi Yoshida, Tomohiro Kubota +2 more | 2011-05-17 |
| 7940419 | Image forming method and apparatus for effectively positioning an image forming member | Yoshiyuki Shimizu | 2011-05-10 |
| 7917077 | Waste-toner housing device, and image forming apparatus | Yoshiyuki Shimizu, Yoshihiro Kawakami, Tomohiro Kubota, Koji Kato, Hirobumi Ooyoshi +1 more | 2011-03-29 |
| 7890044 | Powder conveyance device, toner conveyance device, process cartridge and image forming apparatus | Yoshiyuki Shimizu, Yoshihiro Kawakami, Tomohiro Kubota, Koji Kato, Hirobumi Ooyoshi +1 more | 2011-02-15 |
| 7873302 | Cleaning device and image forming apparatus | Yoshihiro Kawakami, Koji Kato, Hirobumi Ooyoshi, Tomofumi Yoshida, Yoshiyuki Shimizu +1 more | 2011-01-18 |
| 7706724 | Charging-roller bearing member, process cartridge, and image forming apparatus | Yoshihiro Kawakami, Koji Kato, Hirobumi Ooyoshi, Tomofumi Yoshida, Yoshiyuki Shimizu +1 more | 2010-04-27 |
| 7634213 | Toner collecting device, image forming unit and image forming apparatus | Tomofumi Yoshida, Yoshiyuki Shimizu, Hirobumi Ooyoshi, Shintaro Yamada | 2009-12-15 |
| 7623821 | Conveyor device, process cartridge, image forming apparatus, and method of forming image | Tomohiro Kubota, Yoshiyuki Shimizu, Yoshihiro Kawakami, Tomofumi Yoshida, Hirobumi Ooyoshi +1 more | 2009-11-24 |
| D603450 | Process cartridge for image forming apparatus | Yoshihiro Kawakami, Yoshiyuki Shimizu, Tomohiro Kubota, Koji Kato, Hirobumi Ooyoshi +1 more | 2009-11-03 |