Pen-type computer input device
Photoconductive encoder wheel
Phototransistor apparatus with current injection ambient compens
Position code
Position detecting device
Position detecting device and position pointing device therefor
Position detecting method and apparatus
Position detection apparatus
Position detection encoder having plural light receiving and lig
Position detector device
Position detector utilizing gray code format
Position encoder
Position encoder employing three or more colors
Position encoder for determining the angle or position and...
Position encoder using a pseudo-random coding sequence
Position encoder utilizer special gray code
Position encoding using impedance comparison
Position indicating system
Position measuring apparatus with reference marks
Position measuring system and method for operating a position me