Issued Patents All Time
Showing 1–25 of 31 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8879963 | Toner supplying device and image forming apparatus using same | Eichi Koizumi, Hitoshi Ishibashi, Tetsuya Muto | 2014-11-04 |
| 8867937 | Diffuse reflection output conversion method, attached powder amount conversion method, and image forming apparatus | Hideo Muroi, Shuji Hirai, Hitoshi Ishibashi | 2014-10-21 |
| 8818244 | Developing device and image forming apparatus | Hitoshi Ishibashi, Shuji Hirai, Satoshi Kaneko, Hideo Muroi | 2014-08-26 |
| 8311422 | Image forming apparatus having a first and second toner containers and a developing unit | Hitoshi Ishibashi, Tetsuya Muto | 2012-11-13 |
| 8233813 | Image forming apparatus and image-density control method | Akira Yoshida, Shin Hasegawa, Hitoshi Ishibashi, Yoshiaki Miyashita, Kohta Fujimori +4 more | 2012-07-31 |
| 8175471 | Image forming apparatus and image density control method | Kentaroh Tomita, Nobutaka Takeuchi, Hitoshi Ishibashi, Shin Hasegawa, Shinji Kato +2 more | 2012-05-08 |
| 8145100 | Process cartridge including developing unit and incorporated in image forming apparatus | Shinji Kato, Takeroh Kurenuma, Keiichi Yoshida, Shin Hasegawa, Hitoshi Ishibashi +6 more | 2012-03-27 |
| 8103181 | Image forming apparatus and method of adjusting charge bias | Hitoshi Ishibashi, Kohta Fujimori, Shin Hasegawa, Nobutaka Takeuchi, Shinji Kato +5 more | 2012-01-24 |
| 8099006 | Image forming apparatus and image quality correction method used therein | Kohta Fujimori, Shin Hasegawa, Nobutaka Takeuchi, Hitoshi Ishibashi, Kayoko Tanaka | 2012-01-17 |
| 8095025 | Image forming apparatus capable of efficient toner concentration control | Hitoshi Ishibashi, Shin Hasegawa, Kohta Fujimori, Nobutaka Takeuchi, Kayoko Tanaka +2 more | 2012-01-10 |
| 8045874 | Image forming apparatus and image density control method | Akira Yoshida, Shin Hasegawa, Hitoshi Ishibashi, Yoshiaki Miyashita, Kohta Fujimori +3 more | 2011-10-25 |
| 8027605 | Image forming apparatus and image density control method | Nobutaka Takeuchi, Shin Hasegawa, Hitoshi Ishibashi, Shuji Hirai, Kohta Fujimori +2 more | 2011-09-27 |
| 8009997 | Toner replenishment determination device of an image forming apparatus | Osamu Ariizumi, Kazumi Kobayashi, Shinji Kobayashi, Fukutoshi Uchida, Takashi Enami +8 more | 2011-08-30 |
| 7929873 | Image forming apparatus and image density control method | Nobutaka Takeuchi, Shin Hasegawa, Hitoshi Ishibashi, Shuji Hirai, Kohta Fujimori +4 more | 2011-04-19 |
| 7903986 | Reuse method and a reusable device for an image forming apparatus having a first process linear velocity and a second image processing apparatus having a second process linear velocity | Kayoko Tanaka, Shin Hasegawa, Hitoshi Ishibashi, Shuji Hirai, Kohta Fujimori +2 more | 2011-03-08 |
| 7885556 | Image forming apparatus for correcting a toner density target value | Kohta Fujimori, Shin Hasegawa, Nobutaka Takeuchi, Hitoshi Ishibashi, Naoto Watanabe +8 more | 2011-02-08 |
| 7881629 | Image forming apparatus and image density control method | Nobutaka Takeuchi, Hitoshi Ishibashi, Kohta Fujimori, Kayoko Tanaka, Naoto Watanabe | 2011-02-01 |
| 7809291 | Image forming apparatus with a two component developer, toner density detection and toner density correction | Nobutaka Takeuchi, Shinji Kato, Shin Hasegawa, Kouta Fujimori, Kayoko Tanaka +3 more | 2010-10-05 |
| 7778560 | Image forming apparatus and method of adjusting charge bias | Hitoshi Ishibashi, Kohta Fujimori, Shin Hasegawa, Nobutaka Takeuchi, Shinji Kato +5 more | 2010-08-17 |
| 7747182 | Image forming apparatus with toner density control | Shinji Kato, Shin Hasegawa, Kohta Fujimori, Nobutaka Takeuchi, Kayoko Tanaka +3 more | 2010-06-29 |
| 7672602 | Developing unit and image forming apparatus which forces consumption of toner | Osamu Ariizumi, Kazumi Kobayashi, Shinji Kobayashi, Fukutoshi Uchida, Takashi Enami +8 more | 2010-03-02 |
| 7668471 | Image forming apparatus and image forming method | Nobutaka Takeuchi, Shin Hasegawa, Kohta Fujimori, Kayoko Tanaka | 2010-02-23 |
| 7616909 | Image forming apparatus and image forming method | Shinji Kato, Shin Hasegawa, Hitoshi Ishibashi, Kohta Fujimori, Nobutaka Takeuchi +8 more | 2009-11-10 |
| 7603046 | Image forming apparatus including toner supply controlling unit | — | 2009-10-13 |
| 7551862 | Developing device, and process unit and image forming apparatus using the developing device | Kayoko Tanaka, Shin Hasegawa, Kohta Fujimori, Nobutaka Takeuchi | 2009-06-23 |