US PATENT SUBCLASS 455 / 164.1
.~.~.~ With automatic frequency control

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}
161.1  DF  .~.~ Frequency scanning {9}
164.1.~.~.~ With automatic frequency control {1}
164.2  DF  .~.~.~.~> Processor controlled (AFC)

DEFINITION

Classification: 455/164.1

With automatic frequency control:

(under subclass 161.1) Subject matter including a self-regulating control circuit in the receiver which compensates for small variations in a carrier signal frequency to provide a stable audio output.

SEE OR SEARCH THIS CLASS, SUBCLASS:

75, for transceivers with frequency stabilization.

119, for transmitters with automatic frequency control.

173.1, for manual, mechanical, or electromechanical frequency selection means with automatic frequency control.

182.2, for channel or station selection with automatic frequency control.

192.2, for receiver tuning in general with automatic frequency control or fine tuning control.

257, for nontuning receivers with automatic frequency control. SEE OR SEARCH CLASS

331, Oscillators,

1+, for oscillators having automatic frequency control.

348, Television,

735, for television receivers with automatic frequency control.