US PATENT SUBCLASS 455 / 261
.~.~.~.~.~ Variable reactance (e.g., reactance tube)

Current as of: June, 1999
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455 /   HD   TELECOMMUNICATIONS

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  DF  .~.~.~.~ Utilizing particular local oscillator control {4}
261.~.~.~.~.~ Variable reactance (e.g., reactance tube) {1}
262  DF  .~.~.~.~.~.~> Voltage controlled capacitor

DEFINITION

Classification: 455/261

Variable reactance (e.g., reactance tube):

(under subclass 258) Systems wherein the control means comprises variable reactance means. The variable reactance means may consist of a reactance tube or a solid-state type

variable reactance means, e.g., in the oscillator circuit, the reactance of which is a function of applied bias voltage.

SEE OR SEARCH CLASS

331, Oscillators,

36, for automatic frequency stabilized oscillators with particular frequency control reactance device.