US PATENT SUBCLASS 379 / 176
.~ With central power source

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

167  DF  PRIVATE (E.G., HOUSE OR INTERCOM) OR SINGLE LINE SYSTEM {6}
176.~ With central power source

DEFINITION

Classification: 379/176

With central power source:

(under subclass 167) Subject matter having a single electrical energy source for the entire system.