US PATENT SUBCLASS 330 / 305
.~.~ And tuning means

Current as of: June, 1999
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330 /   HD   AMPLIFIERS

250  DF  WITH SEMICONDUCTOR AMPLIFYING DEVICE (E.G., TRANSISTOR) {21}
302  DF  .~ Including frequency-responsive means in the signal transmission path {4}
305.~.~ And tuning means

DEFINITION

Classification: 330/305

And tuning means:

(under subclass 302) Subject matter including a manually adjustable frequency selecting means.

SEE OR SEARCH CLASS

334, Tuners, appropriate subclasses for tuning circuits.

455, Telecommunications,

120+, for transmitters having tuning means; and subclasses 150.1+ for receivers having tuning means.