US PATENT SUBCLASS 379 / 3
.~ Of hybrid or echo suppressor or canceller

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

1  DF  DIAGNOSTIC TESTING, MALFUNCTION INDICATION, OR ELECTRICAL CONDITION MEASUREMENT {12}
3.~ Of hybrid or echo suppressor or canceller

DEFINITION

Classification: 379/3

Of hybrid, or echo suppressor or canceller:

(under subclass 1) Subject matter for testing a device for coupling a two-wire to four-wire interconnecting circuit or for eliminating an echo effect in a telephone system.

SEE OR SEARCH THIS CLASS, SUBCLASS:

345, 391 and 402+, for a hybrid in telephone equipment.

406+, for an echo suppressor.