Issued Patents All Time
Showing 1–20 of 20 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8031904 | Apparatus and method for image process | — | 2011-10-04 |
| 7894624 | Image processing method | — | 2011-02-22 |
| 7324244 | Image forming apparatus and image forming method | Naofumi Yamamoto, Gaku Takano | 2008-01-29 |
| 7315399 | Image forming apparatus and image forming method | Naoko Hamamura | 2008-01-01 |
| 7262884 | Image processing apparatus and image processing method | — | 2007-08-28 |
| 7079284 | Image processing apparatus | Takayuki Sawada | 2006-07-18 |
| 6894808 | Image forming apparatus and image forming method | Naoko Hamamura | 2005-05-17 |
| 6424742 | Image processing apparatus for discriminating image field of original document plural times and method therefor | Naofumi Yamamoto, Gururaj Rao | 2002-07-23 |
| 6411741 | Image processing apparatus | Naoko Hamamura | 2002-06-25 |
| 6095566 | Image recorded product, image recording system, image reproducing system, and recording medium for use to superimpose-record/reproduce additional information | Naofumi Yamamoto, Hidekazu Sekizawa, Kazuhiko Higuchi | 2000-08-01 |
| 5767886 | Ink amount indicative signal correcting apparatus for reducing dispersion degree of overlapping of color inks for each pixel in a color image printer system | Hidekazu Sekizawa | 1998-06-16 |
| 5708514 | Error diffusion method in a multi-level image recording apparatus utilizing adjacent-pixel characteristics | Kazuhiko Higuchi, Hidekazu Sekizawa, Naofumi Yamamoto, Eiichi Sakaue | 1998-01-13 |
| 5652626 | Image processing apparatus using pattern generating circuits to process a color image | Hidekazu Sekizawa, Naofumi Yamamoto | 1997-07-29 |
| 5497180 | Image recording apparatus for representing a halftone by use of a plurality of recorded dots | Hidekazu Sekizawa, Naofumi Yamamoto | 1996-03-05 |
| 5278641 | Brightness referenced color image correcting apparatus | Hidekazu Sekizawa, Naofumi Yamamoto, Tutomu Saito | 1994-01-11 |
| 5136401 | Image layout apparatus for performing pattern modification such as coloring of an original image | Naofumi Yamamoto, Hidekazu Sekizawa | 1992-08-04 |
| 4926251 | Color image processing apparatus with image corrector | Hidekazu Sekizawa, Tutomu Saito, Naofumi Yamamoto, Kazuhiko Higuchi | 1990-05-15 |
| 4803496 | Method for recording a color image | Hidekazu Sekizawa, Naofumi Yamamoto | 1989-02-07 |
| 4745467 | Color image-processing apparatus | Hidekazu Sekizawa, Naofumi Yamamoto, Tutomu Saito | 1988-05-17 |
| 4698669 | Color picture reader and method for operating the same | Hidekazu Sekizawa, Naofumi Yamamoto | 1987-10-06 |