Data transmission system over building wiring

Data transmission system using sending right request signal tran

Data transmission system with a digital alarm facility

Data transmission system with data verification

Data transmission system with distributed microprocessors

Data transmission system with improved fault

Data transmission systems

Data transmission systems

Data-transmission and data-processing system

Data/facsimile telephone subset apparatus incorporating electrop

Database system having a plurality of nodes communicating with e

Datacarriers with separate storage of read and write-inhibited m

DC bus for discrete signals

Dead switch vehicle operator identification

Debit message authorization system for radio receivers

Decentralized line reservation interface within a local data net

Decoder circuit

Decoder circuitry for selectively activating loads

Decoder for transmitted message deactivation code

Decoder/multiplexer circuit including multi-emitter transistors