Issued Patents All Time
Showing 1–25 of 37 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8526855 | Image forming apparatus and image forming method | Masaru Kobashi, Yoichi Yamada, Koji Migita | 2013-09-03 |
| 8412080 | Developing roller manufacturing method, developing roller, developing device, and image forming apparatus | Masahiro Maeda, Yoichi Yamada, Yoshiyuki Kurebayashi, Daisuke Matsumoto, Masaru Kobashi | 2013-04-02 |
| 8401443 | Toner-particle bearing roller, developing device, and image forming apparatus | Yoichi Yamada, Tomohiro Aruga, Noboru Sakurai, Katsumi Okamoto, Hiroshi Kato +1 more | 2013-03-19 |
| 8295723 | Image forming apparatus and image forming method with improved protective agent properties | Masaru Kobashi, Yoichi Yamada | 2012-10-23 |
| 8252497 | Toner, toner production method, and image forming device using the same | Soichi Yamazaki, Hideki Okada, Toshikazu Ono | 2012-08-28 |
| 8175497 | Image forming apparatus applying protective agent | Masaru Kobashi, Yoichi Yamada, Masahiro Maeda | 2012-05-08 |
| 8170454 | Image forming apparatus and image forming method | Yoichi Yamada, Daisuke Matsumoto | 2012-05-01 |
| 8086152 | Developing device, image forming apparatus, image forming system, developing method, and toner bearing member | Yoichi Yamada | 2011-12-27 |
| 8081911 | Development roller, development device, and image forming apparatus | Yoichi Yamada, Masahiro Maeda, Junichi Suzuki | 2011-12-20 |
| 8081910 | Image forming apparatus and image forming method | Yoichi Yamada, Atsunori Kitazawa | 2011-12-20 |
| 8032064 | Developer apparatus, image forming apparatus and developing method | Yoichi Yamada | 2011-10-04 |
| 8027624 | Developer apparatus, an image forming apparatus and an image forming method | Yoichi Yamada, Masahiro Maeda | 2011-09-27 |
| 8023868 | Development roller, development device, and image forming apparatus | Yoichi Yamada, Masahiro Maeda, Junichi Suzuki | 2011-09-20 |
| 8010024 | Developer apparatus with restriction member removing toner from convex sections of toner carrier roller | Yoichi Yamada | 2011-08-30 |
| 7991329 | Developer apparatus, image forming apparatus and developing method | Yoichi Yamada | 2011-08-02 |
| 7974549 | Developing device and image forming apparatus | Takeshi Aoki, Katsumi Okamoto | 2011-07-05 |
| 7965965 | Development device and image forming apparatus | Masahiro Maeda, Yoichi Yamada, Yoshiyuki Kurebayashi, Daisuke Matsumoto, Masaru Kobashi | 2011-06-21 |
| 7945194 | Image forming apparatus and image forming system reducing electrical discharge | Yoichi Yamada, Hiroshi Kato, Tomohiro Aruga | 2011-05-17 |
| 7907879 | Development roller, development device, image forming apparatus, and method of manufacturing development roller | Yoichi Yamada, Masahiro Maeda, Junichi Suzuki | 2011-03-15 |
| 7899376 | Developing device, image forming apparatus, and image forming system | Yoichi Yamada, Hiroshi Kato | 2011-03-01 |
| 7899375 | Developing apparatus, image forming apparatus, image forming system and image forming method | Hiroshi Kato, Osamu Kobayashi | 2011-03-01 |
| 7885554 | Developing device, image forming apparatus, image forming system, cartridge, developing unit and photoconductor unit | Junji Shirokoshi, Katsumi Okamoto, Yuichi Segawa, Satoru Miyamoto, Yoichi Yamada +1 more | 2011-02-08 |
| 7787003 | Image forming apparatus | Takeshi Sowa, Masayuki Kanazawa, Yoichi Mitsui | 2010-08-31 |
| 7783234 | Developer cartridge, image forming apparatus, and shutter device | Katsumi Okamoto, Toshiaki Oshima, Kazuhiro Ichikawa | 2010-08-24 |
| 7639977 | Image forming apparatus that performs charge elimination after secondary transfer to prevent winding of recording medium on intermediate transfer member | Mikio Furumizu, Masahiro Maeda, Yoichi Yamada | 2009-12-29 |