Issued Patents All Time
Showing 1–23 of 23 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 | Yukihiko Okuno, Masahiro Kouzaki, Kentaro Katori, Katsuyuki Hirata | 2002-05-14 |
| 6324375 | Image forming apparatus for adjusting image forming condition and image forming condition adjusting method | Masanori Murakami, Jinju Okuno | 2001-11-27 |
| 6236827 | Image forming apparatus that prevents color deviation of image | — | 2001-05-22 |
| 6218660 | Image forming apparatus | — | 2001-04-17 |
| 6028957 | Image forming apparatus having a noise removing unit | Kentaro Katori, Masahiro Kouzaki, Yukihiko Okuno, Katsuyuki Hirata | 2000-02-22 |
| 6008911 | Digital image forming apparatus | Kazuyuki Fukui, Takanobu Yamada, Hiroyuki Ideyama | 1999-12-28 |
| 6006010 | Digital image forming apparatus | Kazuyuki Fukui, Takanobu Yamada | 1999-12-21 |
| 5999279 | Image forming apparatus having an MTF correction unit | Masahiro Kouzaki, Yukihiko Okuno, Kentaro Katori, Katsuyuki Hirata | 1999-12-07 |
| 5995248 | Image forming device and method having MTF correction | Kentro Katori, Masahiro Kouzaki, Yukihiko Okuno, Katsuyuki Hirata | 1999-11-30 |
| 5966222 | Image forming apparatus having a saturation correction unit | Katsuyuki Hirata, Kentaro Katori, Yukihiko Okuno, Masahiro Kouzaki | 1999-10-12 |
| 5949963 | Image formation apparatus exposing photoconductor according to image density data to form image thereon | Katsuyuki Hirata, Kentaro Katori, Hironobu Nakata, Yoshihiko Hirota | 1999-09-07 |
| 5933255 | Digital image forming apparatus | Katsuyuki Hirata, Kentaro Katori, Masahiro Kouzaki | 1999-08-03 |
| 5729626 | Digital image forming apparatus | Kazuyuki Fukui, Takanobu Yamada | 1998-03-17 |
| 5715067 | Digital image forming apparatus and method with variable duty ratio | Kentaro Katori, Masahiro Kouzaki, Yukihiko Okuno, Katsuyuki Hirata | 1998-02-03 |
| 5682584 | Developer mixing and transporting device | Yoshihiro Hattori, Suguru Hamamichi, Shinichi Yoshimoto | 1997-10-28 |
| 5663814 | Digital image forming apparatus for forming a stable image | Kazuyuki Fukui, Takanobu Yamada | 1997-09-02 |
| 5633669 | Image forming apparatus for synthesizing a differential peak signal and an image signal | Masaki Tanaka, Kazuyuki Fukui, Kouichi Etou | 1997-05-27 |
| 5585927 | Digital image forming apparatus having gradation characteristic setting means | Kazuyuki Fukui, Takanobu Yamada, Hiroyuki Ideyama, Yasuhiro Ohno | 1996-12-17 |
| 5420614 | Digital image forming apparatus | Kazuyuki Fukui, Takanobu Yamada | 1995-05-30 |
| 5311256 | Image forming apparatus maintaining image density stability against humidity | Suguru Hamamichi, Yoshihiro Hattori | 1994-05-10 |
| 5146274 | Toner density measurement apparatus having output characteristics variable with humidity | Yoshihiro Hattori, Kazuyuki Fukui | 1992-09-08 |
| 5119144 | Cleaner provided in a copying machine | Kazuyuki Fukui, Yoshihiro Hattori | 1992-06-02 |
| 5005517 | Developing device | Kazuyuki Fukui, Yoshihiro Hattori | 1991-04-09 |