Device providing sensible output indicating receipt of data by c

Devices for combining random sequences, using one or more switch

Devices for generating pseudo-random sequences

Dialing system for teleprinter

Differential encoding and decoding scheme for digital transmissi

Differential optical polarization detectors

Differential tri-phase shift keyed modulation

Digital autostart circuit

Digital bit rate converter

Digital bit stream synchronizer

Digital carrier wave detect circuitry

Digital circuit for generating output pulses synchronized in tim

Digital coding without additional bits to provide sign informati

Digital communication systems

Digital computer writing board

Digital convergence of multiple image projectors

Digital cryptographic system and testing thereof

Digital cryptographic system having synchronous and asynchronous

Digital data communication system featuring multi level asynchro

Digital data communications system