Issued Patents All Time
Showing 1–25 of 26 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8218990 | Image formation system, image formation method, and image quality improvement method twice heating and pressing a toner image on a recording material | Takeshi Menjo, Jiro Ishiduka, Haruhiko Omata, Motohide Shiozawa, Tatsuomi Murayama | 2012-07-10 |
| 8126343 | Image forming apparatus including density control and control method thereof | — | 2012-02-28 |
| 7945178 | Image forming apparatus including density control and control method thereof | — | 2011-05-17 |
| 7826772 | Image forming apparatus using color toner and transparent toner | Fumitake Hirobe, Tatsuomi Murayama, Akihiro Noguchi | 2010-11-02 |
| 7596345 | Image forming apparatus with a developer comprising at least a toner and a first external additive | Fumitake Hirobe, Tatsuomi Murayama, Akihiro Noguchi | 2009-09-29 |
| 7522852 | Image forming apparatus capable of accomplishing uniformity in glossiness | — | 2009-04-21 |
| 7340190 | Image forming apparatus | Haruhiko Omata | 2008-03-04 |
| 7324765 | Image forming apparatus | Haruhiko Omata | 2008-01-29 |
| 7120368 | Image forming apparatus using two or more toners for ordinary paper or OHP sheet | — | 2006-10-10 |
| 7113729 | Image forming apparatus capable of accomplishing uniformity in glossiness | — | 2006-09-26 |
| 7110686 | Image forming apparatus capable of changing usage ratio among multiple toners | — | 2006-09-19 |
| 6819902 | Image forming apparatus with interchangeable developing devices | Akinori Tanaka | 2004-11-16 |
| 6785480 | Image forming apparatus having a plurality of image forming speeds | Ken-ichiro Kitajima | 2004-08-31 |
| 6646670 | Image forming apparatus and manufacturing method thereof | Kenichiro Kitajima | 2003-11-11 |
| 6591072 | Image forming apparatus with changeable toner returning electric field application period | Kouichi Hashimoto, Ken-ichiro Kitajima | 2003-07-08 |
| 6559876 | Image forming apparatus with exposure reduction mode | Kenichiro Kitajima | 2003-05-06 |
| 6501492 | Image forming apparatus for outputting image in response to digital image signal | Tsuyoshi Kunishi, Kazushige Nishiyama | 2002-12-31 |
| 6463226 | Image forming apparatus which corrects image forming conditions in low-temperature environment and at continuous image formation | Kenichiro Kitajima | 2002-10-08 |
| 6393229 | Image forming apparatus | — | 2002-05-21 |
| 6389240 | Image forming apparatus having plural image processing speeds and plural image correction characteristics | Kenichiro Kitajima | 2002-05-14 |
| 6226108 | Image processing apparatus and method for reproducing high quality image in low-density portion | Tsuyoshi Kunishi, Yukio Watanabe | 2001-05-01 |
| 6091512 | Image processing apparatus and method for improving image reproducibility | Nobuatsu Sasanuma, Yukio Watanabe, Tetsuya Atsumi | 2000-07-18 |
| 6049681 | Image forming apparatus | Motohide Shiozawa | 2000-04-11 |
| 5987275 | Fixing apparatus with power control based on temperature gradient | Tsuyoshi Kunishi | 1999-11-16 |
| 5726759 | Image forming apparatus | Yukio Watanabe, Tsuyoshi Kunishi, Mitsuka Abe | 1998-03-10 |