US PATENT SUBCLASS 379 / 307
.~.~ With power supply

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

242  DF  CENTRALIZED SWITCHING SYSTEM {15}
258  DF  .~ Switching controlled in response to called station addressing signal {9}
307.~.~ With power supply

DEFINITION

Classification: 379/307

With power supply:

(under subclass 258) Subject matter which provides electric power to at least part of the telephone equipment being used.

SEE OR SEARCH THIS CLASS, SUBCLASS:

322, for a power supply in centralized switching.