Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6285464 | Apparatus and method for producing a half-tone image | Akihiro Katayama, Hidefumi Ohsawa | 2001-09-04 |
| 5808431 | Motor rotational speed control apparatus | Satoru Koyama | 1998-09-15 |
| 5325448 | Image treatment method and apparatus with error dispersion and controllable quantization | Akihiro Katayama, Hidefumi Ohsawa | 1994-06-28 |