US PATENT SUBCLASS 455 / 258
.~.~.~.~ Utilizing particular local oscillator control

Current as of: June, 1999
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130  DF  RECEIVER OR ANALOG MODULATED SIGNAL FREQUENCY CONVERTER {24}
230  DF  .~ Local control of receiver operation {7}
255  DF  .~.~ Local oscillator frequency control {2}
257  DF  .~.~.~ Automatic {2}
258.~.~.~.~ Utilizing particular local oscillator control {4}
259  DF  .~.~.~.~.~> Reference oscillator or source {1}
261  DF  .~.~.~.~.~> Variable reactance (e.g., reactance tube) {1}
263  DF  .~.~.~.~.~> Discriminator or detector
264  DF  .~.~.~.~.~> Voltage control of oscillator

DEFINITION

Classification: 455/258

Utilizing particular local oscillator control:

(under subclass 257) Subject matter including automatic frequency control means broadly included with significantly recited details of one or more particular elements within the control circuit whereby the frequency, control of the oscillator is stabilized or adjusted in response to a deviation from the desired frequency.

SEE OR SEARCH CLASS

331, Oscillators,

1+, for oscillators in general having automatic frequency stabilization means, particularly subclass 8 for transistorized controls; subclasses 10+ for plural controls; and subclasses 34+ for particular-type frequency control means.