US PATENT SUBCLASS 379 / 93.21
.~.~.~ Having conferencing

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}
93.17  DF  .~.~ Having station display {7}
93.21.~.~.~ Having conferencing

DEFINITION

Classification: 379/93.21

Having conferencing:

(under subclass 93.17) Subject matter which enables three or more data terminals on distinct subscriber lines to be included in a single call connection.

SEE OR SEARCH THIS CLASS, SUBCLASS:

202, for telephone conferencing.

SEE OR SEARCH CLASS

348, Television,

15, for video conferencing.

370, Multiplex Communications,

260+, for special services with conferencing.