US PATENT SUBCLASS 379 / 93.31
.~.~.~.~ Protocol


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

90.01  DF  TELEPHONE LINE OR SYSTEM COMBINED WITH DIVERSE ELECTRICAL SYSTEM OR SIGNALLING (E.G., COMPOSITE) {8}
93.01  DF  .~ Having transmission of a digital message signal over a telephone line {9}
93.26  DF  .~.~ By voice frequency signal (e.g., tone code) {3}
93.28  DF  .~.~.~ Modulated audio tone {4}
93.31.~.~.~.~ Protocol {3}
93.32  DF  .~.~.~.~.~> Initial setup
93.33  DF  .~.~.~.~.~> Having adjustable speed
93.34  DF  .~.~.~.~.~> Having recognition and selection


DEFINITION

Classification: 379/93.31

Protocol:

(under subclass 93.28) Subject matter including particular details of transmission scheme.

SEE OR SEARCH THIS CLASS, SUBCLASS:

93.08, for transmission scheme, not limited to use of modem.

100.17, for image data transmission scheme.

SEE OR SEARCH CLASS

348, Television,

17+, for video signal transmission scheme.