Issued Patents All Time
Showing 26–43 of 43 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7855042 | Developer and image forming method | Kenji Okado, Masami Fujimoto, Katsuhisa Yamazaki, Syuhei Moribe, Daisuke Yoshiba | 2010-12-21 |
| 7288348 | Color toner | Kazuhiko Hayami, Tetsuya Ida, Nozomu Komatsu, Yasuhiro Ichikawa, Akira Hashimoto +5 more | 2007-10-30 |
| 7279262 | Magnetic carrier and two-component developer | Hiroyuki Fujikawa, Takayuki Itakura, Koh Ishigami, Nobuyoshi Sugahara, Yoshinobu Baba +1 more | 2007-10-09 |
| 7147981 | Toner | Hiroyuki Fujikawa, Masami Fujimoto, Masaaki Taya | 2006-12-12 |
| 6670087 | Toner, image-forming apparatus, process cartridge and image forming method | Hiroyuki Fujikawa, Masaaki Taya, Masami Fujimoto | 2003-12-30 |
| 6653036 | Magnetic toner and image forming method | Hirohide Tanikawa, Masami Fujimoto, Hiroyuki Fujikawa | 2003-11-25 |
| 6235441 | Positively chargeable toner, image forming method and image forming apparatus | Hirohide Tanikawa, Masami Fujimoto, Hiroyuki Fujikawa | 2001-05-22 |
| 6203959 | Toner | Hirohide Tanikawa, Masami Fujimoto, Hiroyuki Fujikawa | 2001-03-20 |
| 6156471 | Toner and image forming method | Hirohide Tanikawa, Masami Fujimoto, Hiroyuki Fujikawa | 2000-12-05 |
| 6007957 | Magnetic toner, image forming method and process cartridge | Tsutomu Onuma, Nobuyuki Okubo, Masaichiro Katada, Masao Takano | 1999-12-28 |
| 6002895 | Process cartridge | Takashige Kasuya, Hiroyuki Suematsu, Koichi Tomiyama, Hiroshi Yusa, Masaichiro Katada | 1999-12-14 |
| 5972553 | Toner for developing electrostatic image, process-cartridge and image forming method | Masaichiro Katada, Takashige Kasuya | 1999-10-26 |
| 5736288 | Toner for developing electrostatic images, process cartridge, and image forming method | Takashige Kasuya, Hiroyuki Suematsu, Koichi Tomiyama, Hiroshi Yusa, Masaichiro Katada | 1998-04-07 |
| 5712073 | Toner for developing electrostatic image, apparatus unit and image forming method | Masaichiro Katada, Takashige Kasuya | 1998-01-27 |
| 5700616 | Developer for developing an electrostatic image and image forming method | Takashige Kasuya, Osamu Tamura, Hiroshi Yusa, Masaichiro Katada | 1997-12-23 |
| 5663026 | Magnetic toner, process cartridge and image forming method | Takashige Kasuya, Hiroyuki Suematsu, Koichi Tomiyama, Hiroshi Yusa, Masaichiro Katada | 1997-09-02 |
| 5464722 | Production of toner for developing electrostatic images | Koichi Tomiyama, Hiroshi Yusa | 1995-11-07 |
| 5424810 | Magnetic toner, magnetic developer, apparatus unit, image forming apparatus and facsimile apparatus | Koichi Tomiyama, Hiroyuki Suematsu, Masayoshi Kato, Hiroshi Yusa | 1995-06-13 |