Issued Patents All Time
Showing 1–9 of 9 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7732114 | Modified nigrosine, its production method, and toner for developing electrostatic charge images using this modified nigrosine | Shinji Amaya | 2010-06-08 |
| 6653040 | Electrophotographic carrier, developer using the same, and developing method | Katsunori Ohba, Takeshi Isonaka, Shinji Amaya | 2003-11-25 |
| 6534229 | Developer for electrostatic image development | Katsunori Ohba, Katsuyuki Ogura, Masanobu Nakamura, Hideki Gambayashi | 2003-03-18 |
| 6455218 | Developer for electrostatic image development and image forming method using the same | Takeshi Isonaka, Katsunori Ohba, Shinji Amaya | 2002-09-24 |
| 6335139 | Toner for electrostatic image development and image forming method employing the same | Hideki Gambayashi, Masanobu Nakamura, Shinji Amaya | 2002-01-01 |
| 6248491 | Toner for electrostatic image development | Hitoshi Takayanagi, Minoru Nomura, Takashi Ito, Kenichi Hirabayashi, Yukiko Soma +2 more | 2001-06-19 |
| 6238836 | Toner composition and developer for electrostatic image development | Masanobu Nakamura, Hideki Gambayashi, Norio Aoki, Yoshinori Shimane, Ryozo Sugawara +1 more | 2001-05-29 |
| 5017450 | Color toner composition for electrostatic developer | Yoshiyuki Iwanari, Shinji Amaya, Seiichi Shimizu | 1991-05-21 |
| 4931370 | Color toner composition for developing electrostatic images | Shinji Amaya, Yoshiyuki Iwanari, Kinji Shinzo, Syuuichi Yamazaki, Seiichi Shimizu +1 more | 1990-06-05 |