Issued Patents All Time
Showing 1–18 of 18 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7546058 | Image forming apparatus with partitioning member | Hiroshi Ishii | 2009-06-09 |
| 7539435 | Image forming apparatus with isolating member for powder developer | Hiroshi Ishii | 2009-05-26 |
| 7366447 | Image forming apparatus having non-contact charging roller | Takashi Mukai, Syohji Tomita, Hiroshi Onda, Hiroshi Ishii, Yoshinobu Okumura | 2008-04-29 |
| 7167665 | Foreign material removing system, method of removing foreign material, printing apparatus and printing method | Syohji Tomita, Hiroshi Onda, Takashi Mukai, Hiroshi Ishii | 2007-01-23 |
| 7035577 | Developing apparatus, image forming apparatus and toner replenishing method | Hiroshi Ishii | 2006-04-25 |
| 6259869 | Image forming apparatus | Takuya Abe, Kiyoshi Toizumi, Fumio Shimazu, Hiromu Yoshimoto, Kouichi Yamauchi +3 more | 2001-07-10 |
| 6233422 | Image forming apparatus having transfer drum with transfer paper charging member | Takuya Abe, Kiyoshi Toizumi, Fumio Shimazu, Hiromu Yoshimoto, Kouichi Yamauchi +3 more | 2001-05-15 |
| 6219498 | Image forming apparatus having improved image transfer characteristics | Masaru Tsuji, Kenji Sugimura, Yoshiya Kinoshita, Hiroshi Tachiki | 2001-04-17 |
| 6169862 | Image forming apparatus with nip time changing device | Takuya Abe, Kiyoshi Toizumi, Fumio Shimazu, Hiromu Yoshimoto, Kouichi Yamauchi +3 more | 2001-01-02 |
| 6118954 | Image forming apparatus having transfer roller with charge-removing and cleaning devices | Takuya Abe, Kiyoshi Toizumi, Fumio Shimazu, Hiromu Yoshimoto, Kouichi Yamauchi +3 more | 2000-09-12 |
| 6081686 | Image forming apparatus having transfer drum with specific construction | Takuya Abe, Kiyoshi Toizumi, Fumio Shimazu, Hiromu Yoshimoto, Kouichi Yamauchi +3 more | 2000-06-27 |
| 6044236 | Image forming apparatus having improved image transfer characteristics | Masaru Tsuji, Kenji Sugimura, Yoshiya Kinoshita, Hiroshi Tachiki | 2000-03-28 |
| 6026256 | Image forming apparatus | Takuya Abe, Kiyoshi Toizumi, Fumio Shimazu, Hiromu Yoshimoto, Kouichi Yamauchi +3 more | 2000-02-15 |
| 5812923 | Image forming apparatus equipped with register rollers for curling transfer paper | Kouichi Yamauchi, Hiroshi Tachiki, Hiromu Yoshimoto, Yuhi Akagawa, Takayuki Ohno +6 more | 1998-09-22 |
| 5799225 | Image forming apparatus having variable transfer and attraction voltage | Takuya Abe, Kiyoshi Toizumi, Fumio Shimazu, Hiromu Yoshimoto, Kouichi Yamauchi +3 more | 1998-08-25 |
| 5623329 | Transfer device for an image forming apparatus | Kouichi Yamauchi, Hiroshi Tachiki, Hiromu Yoshimoto, Yuhi Akagawa, Takayuki Ohno +6 more | 1997-04-22 |
| 5347343 | Photosensitive drum cartridge and an image forming apparatus using the same | Yoshinori Ohtsuka, Hideki Umeda, Toyokazu Mori, Masaru Tsuji | 1994-09-13 |
| 5017962 | Image forming apparatus with process-cartridges | Masaru Tsuji, Keizo Fukunaga | 1991-05-21 |