US PATENT SUBCLASS 455 / 21
.~.~ With demodulator

Current as of: June, 1999
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7  DF  CARRIER WAVE REPEATER OR RELAY SYSTEM (I.E., RETRANSMISSION OF SAME INFORMATION) {12}
20  DF  .~ With frequency conversion {2}
21.~.~ With demodulator

DEFINITION

Classification: 455/21

With demodulator:

(under subclass 20) Subject matter including apparatus for removing the intelligence from the received signal.

SEE OR SEARCH CLASS

329, Demodulators, for demodulators, per se.

330, Amplifiers,

10, for direct current or low frequency alternating current amplifiers of the modulator-demodulator type.