Issued Patents All Time
Showing 1–10 of 10 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6898383 | Image forming apparatus | Masaru Tanaka, Haruji Mizuishi, Hiroyuki Ohkaji, Kenzo Tatsumi, Hiroshi Mizusawa +3 more | 2005-05-24 |
| 6628903 | Image forming apparatus having a sensor for sensing an amount of reflected light from both a photoconductive element and a paper | Masaru Tanaka, Haruji Mizuishi, Hiroyuki Ohkaji, Kenzo Tatsumi, Hiroshi Mizusawa +3 more | 2003-09-30 |
| 6266501 | Image-forming apparatus having a seal for a developer and a method for detecting a removal of the seal | Haruji Mizuishi, Masaru Tanaka, Kenzo Tatsumi, Ken Amemiya, Toshitaka Yamaguchi +3 more | 2001-07-24 |
| 6160969 | Image forming apparatus with a voltage applying unit for image transfer | Kouji Ishigaki, Haruji Mizuishi, Masaru Tanaka, Hiroyuki Ohkaji, Kenzou Tatsumi +3 more | 2000-12-12 |
| 6148161 | Image forming apparatus with improved toner density control | Noriyuki Usui, Ken Amemiya, Haruji Mizuishi, Masaru Tanaka, Kenzo Tatsumi +3 more | 2000-11-14 |
| 6144811 | Image forming apparatus having a sensor for sensing an amount of reflected light from both a photoconductive element and a paper | Masaru Tanaka, Haruji Mizuishi, Hiroyuki Ohkaji, Kenzo Tatsumi, Hiroshi Mizusawa +3 more | 2000-11-07 |
| 6144822 | Image forming apparatus having detachable transfer roller and discharge device | Toshitaka Yamaguchi, Masaru Tanaka, Hiroshi Mizusawa, Kenzo Tatsumi, Ken Amemiya +3 more | 2000-11-07 |
| 6128449 | Image forming apparatus and method for controlling charging and developing bias voltage | Hideki Zenba, Masaru Tanaka, Haruji Mizuishi, Hiroyuki Okaji, Kenzo Tatsumi +2 more | 2000-10-03 |
| 6085062 | Electrophotographic image forming apparatus | Haruji Mizuishi, Ken Amemiya, Hiroshi Mizusawa, Hiroyuki Ohkaji, Masaru Tanaka +2 more | 2000-07-04 |
| 5915143 | Image forming apparatus and method for automatically adjusting toner density in response to humidity variations | Shigeru Watanabe, Masaru Tanaka, Haruji Mizuishi, Hiroshi Yoshinaga, Kenzo Tatsumi +3 more | 1999-06-22 |