US PATENT SUBCLASS 455 / 35.1
.~ Tone coded squelch

Current as of: June, 1999
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455 /   HD   TELECOMMUNICATIONS

31.1  DF  SYSTEM WITH RECEIVER SELECTION {4}
35.1.~ Tone coded squelch {1}
36.1  DF  .~.~> Plural tones {1}

DEFINITION

Classification: 455/35.1

Tone coded squelch:

(under subclass 31.1) Subject matter having device whereby the operating condition of the audio section of a remote receiver is controlled from a distance by means of tone which is sent over an intervening wired or a radio modulated carrier wave circuit.