Issued Patents All Time
Showing 26–37 of 37 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7917077 | Waste-toner housing device, and image forming apparatus | Yoshiyuki Shimizu, Kenzo Tatsumi, 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, Kenzo Tatsumi, Tomohiro Kubota, Koji Kato, Hirobumi Ooyoshi +1 more | 2011-02-15 |
| 7873302 | Cleaning device and image forming apparatus | Koji Kato, Hirobumi Ooyoshi, Tomofumi Yoshida, Kenzo Tatsumi, Yoshiyuki Shimizu +1 more | 2011-01-18 |
| 7706724 | Charging-roller bearing member, process cartridge, and image forming apparatus | Koji Kato, Hirobumi Ooyoshi, Tomofumi Yoshida, Kenzo Tatsumi, Yoshiyuki Shimizu +1 more | 2010-04-27 |
| 7623821 | Conveyor device, process cartridge, image forming apparatus, and method of forming image | Tomohiro Kubota, Yoshiyuki Shimizu, Kenzo Tatsumi, Tomofumi Yoshida, Hirobumi Ooyoshi +1 more | 2009-11-24 |
| D603450 | Process cartridge for image forming apparatus | Kenzo Tatsumi, Yoshiyuki Shimizu, Tomohiro Kubota, Koji Kato, Hirobumi Ooyoshi +1 more | 2009-11-03 |
| D597129 | Process cartridge for image forming apparatus | Kenzo Tatsumi, Yoshiyuki Shimizu, Tomohiro Kubota, Koji Kato, Hirobumi Ooyoshi +1 more | 2009-07-28 |
| D590012 | Process cartridge for image forming apparatus | Kenzo Tatsumi, Yoshiyuki Shimizu, Tomohiro Kubota, Koji Kato, Hirobumi Ooyoshi +1 more | 2009-04-07 |
| D590011 | Process cartridge for image forming apparatus | Kenzo Tatsumi, Yoshiyuki Shimizu, Tomohiro Kubota, Koji Kato, Hirobumi Ooyoshi +1 more | 2009-04-07 |
| D580968 | Process cartridge for image forming apparatus | Kenzo Tatsumi, Yoshiyuki Shimizu, Tomohiro Kubota, Koji Kato, Hirobumi Ooyoshi +1 more | 2008-11-18 |
| 7424263 | Toner recovery belt conveyor, process cartridge, and image forming apparatus using the same | Yoshiyuki Shimizu, Tomohiro Kubota, Hirobumi Ooyoshi, Tomofumi Yoshida, Koji Kato +1 more | 2008-09-09 |
| 6730435 | Active material for non-aqueous secondary battery, and non-aqueous secondary battery using the same | Kenji Nakane, Yasunori Nishida, Hiroshi Ogawa | 2004-05-04 |