Issued Patents All Time
Showing 1–25 of 27 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 |
| 5801844 | Image processing apparatus | Shinji Yamakawa, Hiroshi Takahashi, Kounosuke Maruyama | 1998-09-01 |
| 5798844 | Duplicator having function concerning specific mark put on recording sheet and image forming apparatus having function of processing confidential documents | Yasuhiro Tabata, Nobufumi Nomura | 1998-08-25 |
| 5771104 | Image processing apparatus having function of magnification changing image data | — | 1998-06-23 |
| 5764812 | Image processing apparatus for providing an isolated-dot removing function | — | 1998-06-09 |
| 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 |
| 5659628 | Special-document discriminating apparatus and managing system for image forming apparatus having a special-document discriminating function | Michiyoshi Tachikawa, Shigeo Kurotaka, Takeshi Ukai, Kouji Ishigaki, Hiromi Okubo +4 more | 1997-08-19 |
| 5652803 | Special-document discriminating apparatus and managing system for image forming apparatus having a special-document discriminating function | Michiyoshi Tachikawa, Shigeo Kurotaka, Takeshi Ukai, Kouji Ishigaki, Hiromi Okubo +4 more | 1997-07-29 |
| 5579417 | Image processing apparatus | — | 1996-11-26 |
| 5473444 | Image processing device having function of detecting dotted-image area | Hiromi Okubo | 1995-12-05 |
| 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 |
| 5444543 | Method and apparatus for detecting a closed-loop area of an image | — | 1995-08-22 |
| 5339171 | Image processing apparatus especially suitable for producing smooth-edged output multi-level tone data having fewer levels than input multi-level tone data | Tetsuo Fujisawa | 1994-08-16 |
| 5337162 | Image processing apparatus for preventing occurrence of moire in output image | — | 1994-08-09 |
| 5283664 | Apparatus for converting and processing input bi-level image data and faithfully rendering tones, colors, and edges | Tetsuo Fujisawa, Toshiya Hikita | 1994-02-01 |
| 5144338 | Image recorder using pulse width modulation | — | 1992-09-01 |
| 5144456 | Image processing apparatus and method | — | 1992-09-01 |
| 4984283 | Two dimensional half-tone dot discrimination device | — | 1991-01-08 |
| 4908716 | Image processing apparatus | — | 1990-03-13 |
| 4875190 | Two-dimensional memory unit having a 2d array of individually addressable blocks each having a 2d array of cells | — | 1989-10-17 |
| 4851920 | Digital copying apparatus | — | 1989-07-25 |
| 4805120 | Two-color image recorder | — | 1989-02-14 |
| 4760464 | Shading correction system for image scanning apparatus | — | 1988-07-26 |
| 4707745 | Digital copier with document image region decision device | — | 1987-11-17 |
| 4615018 | Method for writing data into a memory | — | 1986-09-30 |