Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7904007 | Developer storage container and image forming apparatus | Takeshi Ohkawa | 2011-03-08 |
| 6678482 | Image forming apparatus and method for determining suitability of replaceable component | Jitsuo Masuda, Masayasu Narimatsu, Hiroshi Kawamoto, Hiroaki Yoshida, Masahiro Sakai +1 more | 2004-01-13 |
| 6420079 | Electrophotographic toner and electrophotographic apparatus | Yasuharu Morinishi, Tatsuo Imafuku, Junichi Saito, Yoshiaki Akazawa | 2002-07-16 |
| 6214511 | Toner and manufacturing method thereof | Yoshiaki Akazawa, Takeshi Kato, Yasuharu Morinishi, Junichi Saito | 2001-04-10 |
| 5974280 | Image forming apparatus having a toner concentration controlling mechanism based on a clocked time period for the recovery | Yoshiaki Akazawa, Tadashi Nakamura, Toshihiko Murakami, Junichi Saito, Tadayuki Sawai | 1999-10-26 |
| 5839018 | Toner density control for an image forming apparatus | Masato Asanuma, Toshiaki Ino, Kanshiro Okamoto, Hideji Saiko, Toshihisa Ishida +8 more | 1998-11-17 |