Issued Patents All Time
Showing 1–25 of 62 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7955770 | Photoconductor, photoconductor cartridge and image-forming apparatus | Shinji Yasukawa, Tomotake Hiraga, Ken Ikuma | 2011-06-07 |
| 7809295 | Color image forming apparatus and method for stabilizing liquid developer viscosity | Shinji Yasukawa, Ken Ikuma | 2010-10-05 |
| 7723005 | Liquid developer | Koji Akioka, Takashi Teshima, Satoru Miura | 2010-05-25 |
| 7608375 | Liquid developer and image forming apparatus using the same | — | 2009-10-27 |
| 7529503 | Toner, developing device and developing method using the same | Shinji Yasukawa, Hiroyuki Murakami | 2009-05-05 |
| 7390604 | Negatively chargeable spherical toner, color image forming apparatus, and process for producing negatively chargeable spherical toner | Toshiaki Yamagami, Ken Ikuma | 2008-06-24 |
| 7390603 | Image forming apparatus and toner | Toshiaki Yamagami, Satoshi Chiba | 2008-06-24 |
| 7356281 | Toner, developing device and developing method using the same | Shinji Yasukawa, Hiroyuki Murakami | 2008-04-08 |
| 7309554 | Negatively chargeable toner, method for producing the same, and full color image forming apparatus using the negatively chargeable toner | — | 2007-12-18 |
| 7306885 | Toner, production method thereof, and image forming apparatus using same | — | 2007-12-11 |
| 7217486 | Toner and image-forming apparatus using the toner | Hiroshi Kato | 2007-05-15 |
| 7190928 | Image-forming apparatus employing work function relationships | Mikio Furumizu | 2007-03-13 |
| 7135260 | Imaging system | Shinji Yasukawa, Mikio Furumizu, Nobumasa Abe, Masanao Kunugi, Yoshiro Koga | 2006-11-14 |
| 7031646 | Developing device | Shinji Yasukawa, Hiroshi Toyama, Takeshi Kobayashi, Shoji Hiruta | 2006-04-18 |
| 7027758 | Image forming apparatus employing work function relationships | Shinji Yasukawa, Nobumasa Abe, Mikio Furumizu, Kaneo Yoda | 2006-04-11 |
| 7022447 | Toner and image forming apparatus using the same | — | 2006-04-04 |
| 6994942 | Non-magnetic single-component toner, method of preparing the same, and image forming apparatus using the same | Takuya Kadota, Hidehiro Takano, Shinji Yasukawa, Masanao Kunugi | 2006-02-07 |
| 6875550 | Non-magnetic single-component toner, method of preparing the same, and image forming apparatus using the same | Takuya Kadota, Hidehiro Takano, Shinji Yasukawa, Masanao Kunugi | 2005-04-05 |
| 6863380 | Toner used in image forming apparatus | Atsunori Kitazawa, Kiyoteru Katsuki | 2005-03-08 |
| 6829454 | Image forming apparatus with improved transfer efficiency | Shinji Yasukawa, Nobumasa Abe, Mikio Furumizu | 2004-12-07 |
| 6819899 | Image forming apparatus employing work function relationships | Shinji Yasukawa, Nobumasa Abe, Mikio Furumizu, Kaneo Yoda | 2004-11-16 |
| 4963454 | Method for developing electrostatic images using magnetic brush | Koji Yano, Teruaki Higashiguchi, Kazuo Yamamoto, Yoshinobu Kawakami | 1990-10-16 |
| RE32466 | Heat-sensitive color-forming recording material and process for preparation thereof | — | 1987-07-28 |
| 4614698 | Two-component electrophotographic developer with magnetic carrier | Koji Yano, Kazuo Yamamoto, Teruaki Higashiguchi, Yoshinobu Kawakami | 1986-09-30 |
| 4607936 | Electrophotographic apparatus comprising photosensitive layer of amorphous silicon type photoconductor | Teruaki Higashiguchi, Koji Yano, Kazuo Yamamoto, Yoshinobu Kawakami | 1986-08-26 |