Issued Patents All Time
Showing 1–17 of 17 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6388768 | Image forming apparatus which excels in reproducibility of colors, fine lines and gradations even in a copy made from a copied image | Yoshinobu Hada, Masahiro Kouzaki, Kentaro Katori, Katsuyuki Hirata | 2002-05-14 |
| 6281961 | Developing device with mechanism for smoothly circulating developer | Mineyuki Sako, Suguru Hamamichi, Shinichi Yoshimoto, Yoshihiro Shojo | 2001-08-28 |
| 6122472 | Developing apparatus having improved developer distribution | Mineyuki Sako, Shinichi Yoshimoto, Suguru Hamamichi | 2000-09-19 |
| 6028957 | Image forming apparatus having a noise removing unit | Kentaro Katori, Yoshinobu Hada, Masahiro Kouzaki, Katsuyuki Hirata | 2000-02-22 |
| 6021288 | Image forming apparatus | Masaki Tanaka, Toshifumi Watanabe | 2000-02-01 |
| 5999279 | Image forming apparatus having an MTF correction unit | Masahiro Kouzaki, Yoshinobu Hada, Kentaro Katori, Katsuyuki Hirata | 1999-12-07 |
| 5995248 | Image forming device and method having MTF correction | Kentro Katori, Yoshinobu Hada, Masahiro Kouzaki, Katsuyuki Hirata | 1999-11-30 |
| 5978615 | Tandem-type image forming apparatus and image forming condition determination method used in this tandem-type image forming apparatus | Masaki Tanaka, Toshifumi Watanabe | 1999-11-02 |
| 5966222 | Image forming apparatus having a saturation correction unit | Katsuyuki Hirata, Yoshinobu Hada, Kentaro Katori, Masahiro Kouzaki | 1999-10-12 |
| 5963766 | Developing device | Suguru Hamamichi, Shinichi Yoshimoto, Kentaro Katori, Mineyuki Sako, Yoshihiro Shojo | 1999-10-05 |
| 5822079 | Digital image forming apparatus with test image optimization | Toshifumi Watanabe, Kentaro Katori | 1998-10-13 |
| 5724627 | Image forming apparatus which calculates toner consumption in accordance with tone correction | Masaki Tanaka, Naoyoshi Kinoshita | 1998-03-03 |
| 5715067 | Digital image forming apparatus and method with variable duty ratio | Kentaro Katori, Masahiro Kouzaki, Yoshinobu Hada, Katsuyuki Hirata | 1998-02-03 |
| 5708918 | Image formation apparatus that can maintain appropriately toner density in developing device | Masaki Tanaka, Naoyoshi Kinoshita, Atsushi Kawai, Toshifumi Watanabe | 1998-01-13 |
| 5708917 | Toner replenishment device for an image forming apparatus which employs pixel density and toner density information | Atsushi Kawai, Masaki Tanaka, Tetsuya Sakai | 1998-01-13 |
| 5694223 | Digital image forming apparatus which specifies a sensitivity characteristic of a photoconductor | Kentaro Katori, Toshifumi Watanabe, Masaki Tanaka, Hironobu Nakata, Katsuyuki Hirata | 1997-12-02 |
| 5530530 | Apparatus for measuring developer density | Masaki Tanaka, Atsushi Kawai, Tetsuya Sakai, Naoyoshi Kinoshita | 1996-06-25 |