Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6953646 | Toner particles including a sulfur-containing resin | Tadashi Doujo, Nene Shibayama, Yusuke Hasegawa | 2005-10-11 |
| 6613490 | Toner, image forming method and process-cartridge | Satoshi Matsunaga, Junko Yoshikawa, Ryota Kashiwabara | 2003-09-02 |
| 6232027 | Toner having negative triboelectric chargeability and image forming method | Satoshi Matsunaga, Toshiaki Nakahara, Hirohide Tanikawa, Minekazu Endo, Tadashi Doujo +1 more | 2001-05-15 |
| 5976752 | Toner and image forming method | Satoshi Matsunaga, Koichi Tomiyama, Keita Nozawa, Minekazu Endo, Tadashi Doujo +2 more | 1999-11-02 |
| 5858597 | Toner for developing electrostatic image containing specified double oxide particles | Takaaki Kohtaki, Yushi Mikuriya, Tadashi Doujo | 1999-01-12 |
| 5695902 | Toner for developing electrostatic image, image forming method and process-cartridge | Yushi Mikuriya, Tadashi Doujo | 1997-12-09 |