Issued Patents All Time
Showing 51–58 of 58 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6144811 | Image forming apparatus having a sensor for sensing an amount of reflected light from both a photoconductive element and a paper | Mayumi Ohori, Masaru Tanaka, Haruji Mizuishi, Hiroyuki Ohkaji, Kenzo Tatsumi +3 more | 2000-11-07 |
| 6144822 | Image forming apparatus having detachable transfer roller and discharge device | Toshitaka Yamaguchi, Masaru Tanaka, Hiroshi Mizusawa, Kenzo Tatsumi, Haruji Mizuishi +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, Hiroshi Mizusawa, Hiroyuki Ohkaji, Mayumi Ohori, Masaru Tanaka +2 more | 2000-07-04 |
| 6055388 | Image forming apparatus and method for obtaining appropriate toner density | Shigeru Watanabe, Masaru Tanaka, Haruji Mizuishi, Kenzou Tatsumi, Toshitaka Yamaguchi +3 more | 2000-04-25 |
| 6006050 | Image forming method and apparatus for controlling amount of supplied toner or agitating time | Shigeru Watanabe, Masaru Tanaka, Haruji Mizuishi, Toshitaka Yamaguchi, Kenzou Tatsumi +3 more | 1999-12-21 |
| 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 |
| 5887224 | Image forming device with improved mixing of circulated developer with replensihed toner | Haruji Mizuishi, Masaru Tanaka, Shigeru Watanabe, Kenzo Tatsumi, Toshitaka Yamaguchi +3 more | 1999-03-23 |