Diffraction element and optical machine-reading device
Diffractive optical beam shaping methods and apparatus for provi
Diffractive optical variable image including barcode
Digital audio output device
Digital automatic gain control for multi-stage amplification cir
Digital bar code slot reader with threshold comparison of the di
Digital circuit for a laser scanner using a first derivative sig
Digital clock gearing
Digital code reader
Digital control system for an electro-optical device
Digital data apparatus including an application insert sensor
Digital data apparatus with datastrip compression and expansion
Digital data optical recording and playback system
Digital data reader
Digital detection system for differential phase shift keyed sign
Digital document scanning system
Digital electronic timepiece
Digital electronic timepiece
Digital frequency multiplier
Digital illumination and imaging subsystem employing...