Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6201426 | Pulse generation device having integrating circuit having substantially constant charging/discharging ratio | Hajime Sumiyoshi | 2001-03-13 |
| 5596374 | Television receiver that controls display contrast based on the type of videos being displayed | Hajime Sumiyoshi | 1997-01-21 |