Issued Patents All Time
Showing 26–27 of 27 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5708514 | Error diffusion method in a multi-level image recording apparatus utilizing adjacent-pixel characteristics | Kazuhiko Higuchi, Hidekazu Sekizawa, Naofumi Yamamoto, Haruko Kawakami | 1998-01-13 |
| 5583646 | Apparatus for distinguishing image portions through image expansion | Naofumi Yamamoto, Hidekazu Sekizawa | 1996-12-10 |