US PATENT SUBCLASS 379 / 444
.~.~ Acoustic

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

441  DF  TERMINAL ACCESSORY OR AUXILIARY EQUIPMENT {9}
443  DF  .~ Including coupler (e.g., inductive) {1}
444.~.~ Acoustic

DEFINITION

Classification: 379/444

Acoustic:

(under subclass 443) Subject matter where the transfer is performed by direct circuit connection.

SEE OR SEARCH THIS CLASS, SUBCLASS:

78, for this subject matter combined with a telephone answering device.