Issued Patents All Time
Showing 1–17 of 17 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6272248 | Original-discrimination system for discriminating special document, and image forming apparatus, image processing apparatus and duplicator using the original-discrimination system | Takashi Saitoh, Hiroshi Takahashi, Yoshio Kaneko, Shigeo Kurotaka, Toshiya Hikita +11 more | 2001-08-07 |
| 6005673 | Facsimile machine and facsimile communication system | Kenichi Mizuma | 1999-12-21 |
| 5751854 | Original-discrimination system for discriminating special document, and image forming apparatus, image processing apparatus and duplicator using the original-discrimination system | Takashi Saitoh, Hiroshi Takahashi, Yoshio Kaneko, Shigeo Kurotaka, Toshiya Hikita +11 more | 1998-05-12 |
| 5682572 | Image density control method for an image recorder | Shinji Kato, Hisao Murayama | 1997-10-28 |
| 5475476 | Image density control method for an image recorder | Shinji Kato, Hisao Murayama | 1995-12-12 |
| 5444518 | Image forming apparatus which adds identification information to recorded images to prevent forgery | Tadato Hashiguchi, Michiyoshi Tachikawa, Takeshi Ukai, Yoshio Kaneko, Hiroshi Takahashi +5 more | 1995-08-22 |
| 5237370 | Image density control method for image recorder | — | 1993-08-17 |
| 5032904 | Color image processing apparatus | Nobuo Kasahara, Kenji Hashimoto | 1991-07-16 |
| 4979129 | Digital color converting apparatus for color image processor | Hiromi Okubo, Takanori Itoh | 1990-12-18 |
| 4962421 | Color image generating apparatus | — | 1990-10-09 |
| 4933874 | Printer | Kenichirou Asada, Yoshiki Yoshida | 1990-06-12 |
| 4667250 | Halftone digital image processing device | — | 1987-05-19 |
| 4639117 | Recording image density control method for electrophotography | Yasushi Koichi | 1987-01-27 |
| 4572654 | Image density control method for electrophotography | Yutaka Hasegawa | 1986-02-25 |
| 4539279 | Image density control method | Yutaka Hasegawa | 1985-09-03 |
| 4519695 | Image density control method for electrophotography | Yutaka Hasegawa | 1985-05-28 |
| 4353299 | Automatic control system for offset printing machine | Kenji Hashimoto, Kiyoshi Fukushima, Sumio Suzuki | 1982-10-12 |