Alert receiver interface

Apparatus for detecting an electronic surveillance device

Automatic emergency alarm reception apparatus using specific fre

Automobile radio and tape cassette switching apparatus

Battery-powered receivers

Circuit for decoding traffic information message tone signals

Decoder for traffic information regional tone signals

Detection circuit of tone signal

Detector for multiplicity of radio wave frequencies

Electronic broadcast radio skip protection

Electronic surveillance device detector and method using phase a

Localization of narrowband signals

Method of and apparatus for selecting station in multiplexed bro

Police radar detector

Radio communications system designed for a low-power receiver

Radio selective calling receiver having infrared data transmissi

Reception apparatus, signal reproducing apparatus using receptio

Selective calling receiver including a voltage converter with lo

Traffic information radio signal receiver