Issued Patents All Time
Showing 1–13 of 13 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9238561 | Image forming apparatus | — | 2016-01-19 |
| 9224075 | Image forming apparatus | — | 2015-12-29 |
| 5703888 | Method for checking a reloadable memory, memory checking device, and automatic data restoring device | Masashi Matsumoto, Yasushi Saito, Shuji Yamada | 1997-12-30 |
| 5666544 | Method and system for communicating data between independent controllers | Masashi Matsumoto, Yasushi Saito, Shuji Yamada | 1997-09-09 |
| 5534977 | Image forming apparatus having a function to charge a photoreceptor drum at an appropriate potential | Yasushi Saitoh, Masashi Matsumoto, Shuji Yamada | 1996-07-09 |
| 5469243 | Image forming apparatus having a function to charge at a low main charging voltage | Yasushi Saitoh, Masashi Matsumoto, Shuji Yamada | 1995-11-21 |
| 5293206 | Color image forming apparatus with optium operation of developing device positioning mechanism | Syuji Yamada, Masashi Matsumoto, Mayumi Uramoto, Yasuyuki Fukunaga | 1994-03-08 |
| 5230043 | Arrangement for diagnosing the cause of communication interruption between two CPUS | Syuji Yamada, Masashi Matsumoto | 1993-07-20 |
| 5144387 | Color image forming apparatus | Hideyuki Tanaka, Hiroyuki Deguchi | 1992-09-01 |
| 5142325 | Image forming apparatus | Masami Kai, Toshinobu Katafuchi, Hideyuki Tanaka, Toru Taniguchi, Syuji Yamada | 1992-08-25 |
| 4860053 | Color image forming apparatus having a plurality of developing units | Haruo Yamamoto, Shuji Fujisawa, Eiichi Tone, Takeshi Tsuda | 1989-08-22 |
| 4827283 | Lighting control method and a lighting control apparatus of a light source in an image forming apparatus | Haruo Yamamoto | 1989-05-02 |
| 4763174 | Magnification selecting device in a photocopier | Yoshinori Makiura, Takahiro Wakikaido, Haruo Yamamoto, Shusaku Ogawa | 1988-08-09 |