US PATENT SUBCLASS 379 / 318
.~.~ Central power source

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

242  DF  CENTRALIZED SWITCHING SYSTEM {15}
315  DF  .~ With line-signal control {3}
318.~.~ Central power source

DEFINITION

Classification: 379/318

Central power source:

(under subclass 315) Subject matter including a common, centrally located, power supply for signalling, talking, or both.

SEE OR SEARCH THIS CLASS, SUBCLASS:

322+, for power supplies in centralized switching systems.