US PATENT SUBCLASS 455 / 178.1
.~.~.~ With plurality of tunable circuits

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}
178.1.~.~.~ With plurality of tunable circuits

DEFINITION

Classification: 455/178.1

With plurality of tunable circuits:

(under subclass 170.1) Subject matter including separate circuits each being adjustable by the operation of manual, mechanical, or electromechanical means (e.g., tuning shaft).

SEE OR SEARCH THIS CLASS, SUBCLASS:

187.1, for channel or station selection receivers using separate tuned circuits for each channel or station.

191.1+, for band selection receivers with plural tuned circuits or tunable coupled stages.

SEE OR SEARCH CLASS

334, Tuners,

2, for plural diverse type tuners and subclasses 42+ for resonant line element tuners employing plural operated tuning units.