Issued Patents All Time
Showing 1–25 of 31 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8428488 | Charging device, process cartridge, image forming apparatus, and toner | Tokuya Ojimi, Toshio Koike, Takeshi Shintani, Yuji Arai, Takuzi Yoneda +7 more | 2013-04-23 |
| 8000627 | Charging device, process cartridge, image forming apparatus, and toner | Tokuya Ojimi, Toshio Koike, Takeshi Shintani, Yuji Arai, Takuzi Yoneda +7 more | 2011-08-16 |
| 7826786 | Image forming apparatus, lubricant applying device, transfer device, process cartridge, and toner | Takeo Suda, Shinichi Kawahara, Takatsugu Fujishiro, Tokuya Ojimi, Takeshi Tabuchi +15 more | 2010-11-02 |
| 7672635 | Method and apparatus for image forming and effectively applying lubricant to an image bearing member | Yoshiki Hozumi, Toshio Koike, Ken Amemiya, Masanori Kawasumi, Yuji Arai +5 more | 2010-03-02 |
| 7539451 | Image forming apparatus and toner | Masanori Kawasumi, Tokuya Ojimi, Toshio Koike, Takeshi Shintani, Yuji Arai +8 more | 2009-05-26 |
| 7522850 | Image forming apparatus, process cartridge, developing unit, and image forming method | Kazuhito Watanabe, Satoshi Narumi, Shinji Tamaki, Satoshi Hatori, Tsutomu Katoh +2 more | 2009-04-21 |
| 7493061 | Process cartridge including at least one replaceable member and image forming apparatus | Satoshi Hatori, Kazuhito Watanabe, Satoshi Narumi, Shinji Tamaki, Tsutomu Katoh +1 more | 2009-02-17 |
| 7477856 | Method and apparatus for image forming capable of effectively preventing resonance of frequencies | Takuzi Yoneda, Hiroshi Ono, Masanori Kawasumi, Yuji Arai, Toshio Koike +5 more | 2009-01-13 |
| 7373101 | Method and apparatus for image forming and effectively applying lubricant to an image bearing member | Yoshiki Hozumi, Toshio Koike, Ken Amemiya, Masanori Kawasumi, Yuji Arai +5 more | 2008-05-13 |
| 7333744 | Image forming apparatus that charges a photosensitive member by superimposing an alternate current bias voltage on a direct current bias voltage as the charge bias voltage | Eiji Shimojo, Tokuya Ojimi, Masanori Kawasumi, Takuzi Yoneda, Ken Amemiya +6 more | 2008-02-19 |
| 7313347 | Cleaning device, process cartridge, image forming apparatus and toner | Takeshi Shintani, Takuzi Yoneda, Ken Amemiya, Takaaki Tawada, Tokuya Ojimi +12 more | 2007-12-25 |
| 7209698 | Method and apparatus for image forming capable of using minuscule spherical particles of toner, a process cartridge in use for the apparatus and a toner used in the image forming for obtaining an image with a high thin line reproducibility | Takaaki Tawada, Shinichi Kawahara, Takeo Suda, Chohtaroh Kataoka, Keiichi Yoshida | 2007-04-24 |
| 7177555 | Image forming process and image forming apparatus | Bing Shu, Mitsuo Aoki, Mikio Ishibashi, Masaru Tanaka, Shinji Tamaki +2 more | 2007-02-13 |
| 7158730 | Image forming apparatus, process cartridge, developing unit, and image forming method | Kazuhito Watanabe, Satoshi Narumi, Shinji Tamaki, Satoshi Hatori, Tsutomu Katoh +2 more | 2007-01-02 |
| 6928255 | Image forming apparatus including developing gap between image and developer carriers | — | 2005-08-09 |
| 6898383 | Image forming apparatus | Mayumi Ohori, Masaru Tanaka, 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 | Mayumi Ohori, Masaru Tanaka, 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 | Masaru Tanaka, Kenzo Tatsumi, Ken Amemiya, Toshitaka Yamaguchi, Hideki Zemba +3 more | 2001-07-24 |
| 6160969 | Image forming apparatus with a voltage applying unit for image transfer | Kouji Ishigaki, Masaru Tanaka, Hiroyuki Ohkaji, Kenzou Tatsumi, Hiroshi Mizusawa +3 more | 2000-12-12 |
| 6148161 | Image forming apparatus with improved toner density control | Noriyuki Usui, Ken Amemiya, Mayumi Ohori, 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 | Mayumi Ohori, Masaru Tanaka, 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, Hiroyuki Okaji, Kenzo Tatsumi, Hiroshi Mizusawa +2 more | 2000-10-03 |
| 6085062 | Electrophotographic image forming apparatus | Ken Amemiya, 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, Kenzou Tatsumi, Toshitaka Yamaguchi, Takeo Suda +3 more | 2000-04-25 |