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.