Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8170447 | Image forming apparatus, developing apparatus and contact-retracting method | Keisuke Kubo, Kei Hirata, Tomio Onuki, Takeshi Okoshi, Toshikazu Tsumita +5 more | 2012-05-01 |
| 8135312 | Development apparatus and image forming apparatus | Kazunori Koshimori, Kei Hirata, Akihide Kawamura, Naoya Iwata, Keisuke Kubo +5 more | 2012-03-13 |
| D431260 | Toner cartridge | Hiroshi Nakada | 2000-09-26 |
| 5915151 | Rotary-type developing unit | Shintaro Kaneko, Ryuji Hattori, Shigemi Murata, Tetsuji Okamoto | 1999-06-22 |