US PATENT SUBCLASS 379 / 389
.~.~ With circuitry for voice control of transmission direction

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

387  DF  SUBSTATION OR TERMINAL CIRCUITRY {7}
388  DF  .~ For loudspeaking terminal {2}
389.~.~ With circuitry for voice control of transmission direction

DEFINITION

Classification: 379/389

With circuitry for voice control of transmission direction:

(under subclass 388) Subject matter permitting operation f the terminal in only one direction in response to the presence of a voice signal to be transmitted.

SEE OR SEARCH CLASS

381, Electrical Audio Signal Processing Systems and Devices,

110, for a voice controlled one-way audio system.