(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.
