Issued Patents 2011
Showing 1–9 of 9 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8081897 | Seal member, developing device, process cartridge, and image forming apparatus | Kenzo Tatsumi, Tomofumi Yoshida, Hirobumi Ooyoshi, Yoshihiro Kawakami, Yoshiyuki Shimizu | 2011-12-20 |
| 8019254 | Toner conveying device, process cartridge, and image forming apparatus | Kenzo Tatsumi, Koji Kato, Hirobumi Ooyoshi, Tomofumi Yoshida, Yoshihiro Kawakami +1 more | 2011-09-13 |
| 7979013 | Developing device of image forming apparatus | Tomofumi Yoshida, Hirobumi Ooyoshi, Kenzo Tatsumi, Yoshihiro Kawakami, Yoshiyuki Shimizu | 2011-07-12 |
| 7965957 | Developing device and image forming apparatus that uses this developing device | Kenzo Tatsumi, Yoshihiro Kawakami, Yoshiyuki Shimizu, Hirobumi Ooyoshi, Tomofumi Yoshida +1 more | 2011-06-21 |
| 7965958 | Developing device, process cartridge and image forming apparatus | Kenzo Tatsumi, Yoshihiro Kawakami, Yoshiyuki Shimizu, Hirobumi Ooyoshi, Tomofumi Yoshida +1 more | 2011-06-21 |
| 7945203 | Waste-toner collecting device, process cartridge, and image forming apparatus | Yoshiyuki Shimizu, Kenzo Tatsumi, Hirobumi Ooyoshi, Yoshihiro Kawakami, Tomofumi Yoshida +2 more | 2011-05-17 |
| 7917077 | Waste-toner housing device, and image forming apparatus | Yoshiyuki Shimizu, Kenzo Tatsumi, Yoshihiro Kawakami, 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, Yoshihiro Kawakami, Koji Kato, Hirobumi Ooyoshi +1 more | 2011-02-15 |
| 7873302 | Cleaning device and image forming apparatus | Yoshihiro Kawakami, Koji Kato, Hirobumi Ooyoshi, Tomofumi Yoshida, Kenzo Tatsumi +1 more | 2011-01-18 |