Issued Patents 1997
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5661575 | Gradation correction method and device | Haruo Yamashita, Hideshi Ishihara | 1997-08-26 |
| 5644351 | Thermal gradation printing apparatus | Haruo Yamashita, Hideshi Ishihara | 1997-07-01 |