US PATENT SUBCLASS 379 / 344
.~ Component processes bidirectional signals

Current as of: June, 1999
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379 /   HD   TELEPHONIC COMMUNICATIONS

338  DF  REPEATER (E.G., VOICE FREQUENCY) {9}
344.~ Component processes bidirectional signals {1}
345  DF  .~.~> Including two-to-four wire conversion or hybrid circuit

DEFINITION

Classification: 379/344

Component processes bidirectional signals:

(under subclass 338) Subject matter including a component handling signals travelling in either direction over a telephone line.

SEE OR SEARCH CLASS

370, Multiplex Communications,

276+, for a duplex repeater.