US PATENT SUBCLASS 379 / 392
.~.~ Suppression (e.g., antisidetone)

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

387  DF  SUBSTATION OR TERMINAL CIRCUITRY {7}
391  DF  .~ Sidetone control or hybrid circuit (e.g., induction coil) {1}
392.~.~ Suppression (e.g., antisidetone)

DEFINITION

Classification: 379/392

Suppression (e.g., anti-sidetone):

(under subclass 391) Subject matter for minimizing the amount of sidetone reproduced by a receiver.