Issued Patents All Time
Showing 1–12 of 12 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8351830 | Belt conveying device and image forming apparatus | Koichi Kudo, Takuro Kamiya, Junya Takigawa, Hiroaki Takagi, Yuichi Hirose +2 more | 2013-01-08 |
| 7853189 | Belt moving device and image forming apparatus using same | Mikio Kamoshita, Koichi Kudo, Masahiko Kato | 2010-12-14 |
| 6842598 | Image forming apparatus having a plurality of developing means around an image carrier | Nobuyuki Yanagawa | 2005-01-11 |
| 6718151 | Image formation apparatus and method of alternating developing units | Nobuyuki Yanagawa | 2004-04-06 |
| 6574442 | Image forming method | — | 2003-06-03 |
| 6292641 | Image forming apparatus selectively operating one of a plurality of developing units and a method for controlling a switching operation for the developing units | Yoshinobu Takeyama, Masanori Saitoh, Nobuyuki Yanagawa | 2001-09-18 |
| 6256461 | Image forming apparatus with an intermediate transfer body including reference markers for controlling the same | Yoshinobu Takeyama, Nobuyuki Yanagawa, Masanori Saito, Tomoyoshi Takeuchi, Masatoshi Tanaka +1 more | 2001-07-03 |
| 6215974 | Image forming apparatus with a toner mounter having a vibration apparatus | Masahiko Katoh, Nobuyuki Yanagawa, Masanori Saito, Akira Imai | 2001-04-10 |
| 6157797 | Image forming apparatus with integrated rotatable image carrier and writing device and method of assembling the same | Masanori Saito, Nobuyuki Yanagawa, Yoshinobu Takeyama | 2000-12-05 |
| 5172356 | Separation type optical pickup device | — | 1992-12-15 |
| 5159587 | Separation type optical pick-up device | — | 1992-10-27 |
| 5140572 | Optical pickup device having fixed and movable optical systems | Takehide Ohno | 1992-08-18 |