US PATENT SUBCLASS 370 / 279
.~.~ Duplex repeaters

Current as of: June, 1999
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370 /   HD   MULTIPLEX COMMUNICATIONS

276  DF  DUPLEX {6}
277  DF  .~ Communication over free space {4}
279.~.~ Duplex repeaters

DEFINITION

Classification: 370/279

Duplex repeaters:

(under subclass 277) Subject matter including circuitry for compensating attenuation losses of duplex signals or for increasing the communication range for extension terminal equipment at either end of a duplex transmission line.

SEE OR SEARCH CLASS

178, Telegraphy,

70+, for a teles:graphic nonmultiplex repeater.

455, Telecommunications,

7+, for a nonmultiplex telecommunication repeater system.