US PATENT SUBCLASS 370 / 493
.~.~ Combined voice and data transmission

Current as of: June, 1999
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370 /   HD   MULTIPLEX COMMUNICATIONS

464  DF  COMMUNICATION TECHNIQUES FOR INFORMATION CARRIED IN PLURAL CHANNELS {9}
480  DF  .~ Combining or distributing information via frequency channels {11}
493.~.~ Combined voice and data transmission {2}
494  DF  .~.~.~> Data over voice
495  DF  .~.~.~> Data under voice

DEFINITION

Classification: 370/493

Combined voice and data transmission:

(under subclass 480) Subject matter having transmission of a composite signal comprising audio and data.