US PATENT SUBCLASS 379 / 322
.~ Power supply


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

242  DF  CENTRALIZED SWITCHING SYSTEM {15}
322.~ Power supply {2}
323  DF  .~.~> Power to switching equipment
324  DF  .~.~> Central power source (e.g., common battery, line current feed)


DEFINITION

Classification: 379/322

Power supply:

(under subclass 242) Subject matter which supplies electricity to a telephone system component.