Issued Patents All Time
Showing 26–28 of 28 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4737633 | Inclined filter for photoelectric touch panel | Hiroaki Sasaki, Kazuo Hasegawa | 1988-04-12 |
| 4737631 | Filter of photoelectric touch panel with integral spherical protrusion lens | Hiroaki Sasaki, Kazuo Hasegawa | 1988-04-12 |
| 4725726 | Optical coordinate input device having waveform shaping circuit | Kazuo Hasegawa, Hiroaki Sasaki, Takanori Miura | 1988-02-16 |