Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4903012 | Coordinate system input device providing registration calibration and a mouse function | — | 1990-02-20 |
| 4812642 | Optical coordinate system input device | Kazuo Hasegawa, Hiroaki Sasaki | 1989-03-14 |
| 4806749 | Optical coordinate system input device | Kazuo Hasegawa, Hiroaki Sasaki | 1989-02-21 |
| 4774404 | Optical path blockage detecting device | Kazuo Hasegawa, Hiroaki Sasaki | 1988-09-27 |