Issued Patents All Time
Showing 1–17 of 17 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7800798 | Print quality measuring method and print quality measuring apparatus | — | 2010-09-21 |
| 7418114 | Print tone measuring method | — | 2008-08-26 |
| 6976425 | Ink feeding rate control method and an ink feeding rate control apparatus | Hideki Morikawa | 2005-12-20 |
| 6792863 | Printing apparatus for automatically controlling ink supply device | Takaharu Yamamoto, Nobuhito Kohara | 2004-09-21 |
| 6769361 | Printing machine for controlling feeding rates by color density measurement | Takaharu Yamamoto, Nobuhito Kohara | 2004-08-03 |
| 6732645 | Method of presetting ink | Takaharu Yamamoto, Nobuhito Kohara, Kuniharu Okuda | 2004-05-11 |
| 6069981 | Image conversion method and record medium | — | 2000-05-30 |
| 5982946 | Method of identifying defective pixels in digital images, and method of correcting the defective pixels, and apparatus and recording media therefor | — | 1999-11-09 |
| 5896469 | Image sharpness processing method and apparatus | — | 1999-04-20 |
| 5793501 | Contrast correcting apparatus | — | 1998-08-11 |
| 5442717 | Sharpness processing apparatus | — | 1995-08-15 |
| 5335097 | Color tone correcting apparatus | — | 1994-08-02 |
| 5204919 | Method of and apparatus for performing detail enhancement | — | 1993-04-20 |
| 5062144 | Method of obtaining white reference data used for correcting non-uniformity in photoelectric cell array | — | 1991-10-29 |
| 4868671 | Method of and apparatus for noise reduction in multi-gradation image signal in halftone image reader | — | 1989-09-19 |
| 4821110 | Method of and apparatus for correcting a read position error in subscanning direction of a line image sensor | — | 1989-04-11 |
| 4712134 | Image reader with plural pickup elements reading overlapping image regions of an original image | — | 1987-12-08 |