US PATENT SUBCLASS 455 / 230
.~ Local control of receiver operation

Current as of: June, 1999
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130  DF  RECEIVER OR ANALOG MODULATED SIGNAL FREQUENCY CONVERTER {24}
230.~ Local control of receiver operation {7}
231  DF  .~.~> Applied at or for specific intervals or periods of time
232.1  DF  .~.~> Gain control {2}
254  DF  .~.~> Sensitivity control
255  DF  .~.~> Local oscillator frequency control {2}
266  DF  .~.~> Selectivity or bandwidth control
267  DF  .~.~> Tone control
268  DF  .~.~> Fidelity control

DEFINITION

Classification: 455/230

Local control of receiver operation:

(under subclass 130) Subject matter including provision for controlling an operating characteristic of the receiver.

(1) Note. The control may be automatic or manual.

(2) Note. Remote control is excluded from this subclass and will be found in subclasses 352+.