Inventor
OHUCHI JUNICHI
JP4 patents
Patents
4 patentsUS4903012AFeb 20, 1990
Coordinate system input device providing registration calibration and a mouse function
ALPS ELECTRIC CO LTD71 citations92
US4812642AMar 14, 1989
Optical coordinate system input device
ALPS ELECTRIC CO LTD29 citations92
US4774404ASep 27, 1988
Optical path blockage detecting device
ALPS ELECTRIC CO LTD22 citations81
US4806749AFeb 21, 1989
Optical coordinate system input device
ALPS ELECTRIC CO LTD10 citations73