US PATENT SUBCLASS 455 / 402
.~ Over power line


Current as of: June, 1999
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455 /   HD   TELECOMMUNICATIONS

400  DF  HAVING SINGLE-CHANNEL TELEPHONE CARRIER {2}
402.~ Over power line


DEFINITION

Classification: 455/402

Over power line:

(under subclass 400) Subject matter wherein a modulated telephone carrier is transmitted over a power line electrical conductor.

(1) Note. Included herein are residential type plug-in intercoms.

SEE OR SEARCH THIS CLASS, SUBCLASS:

3.3, for distribution system combined with power distribution network.

SEE OR SEARCH CLASS

340, Communications: Electrical,

310.01+, for electrical signaling over a power line.

370, Multiplex Communications, 485+, for combining or distributing information via carrier frequency channels which may be transmitted over a power line.

379, Telephonic Communications,

167+, for a general intercom system.