US PATENT SUBCLASS 455 / 174.1
.~.~.~ With muting (e.g., silent tuning)

Current as of: June, 1999
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455 /   HD   TELECOMMUNICATIONS

130  DF  RECEIVER OR ANALOG MODULATED SIGNAL FREQUENCY CONVERTER {24}
150.1  DF  .~ Signal selection based on frequency (e.g., tuning) {13}
170.1  DF  .~.~ With mechanical or electromechanical selection {7}
174.1.~.~.~ With muting (e.g., silent tuning)

DEFINITION

Classification: 455/174.1

With muting (e.g., silent tuning):

(under subclass 170.1) Subject matter including means for silencing the receiver at all times except when the signal selection means is exactly adjusted to the desired carrier frequency.

SEE OR SEARCH THIS CLASS, SUBCLASS:

194.1+, for signal selection receivers (nonmechanical type) with muting.

212+, for FM receivers with muting or squelch circuits.

218+, for receivers in general with muting or squelching circuits.