US PATENT SUBCLASS 379 / 122
.~.~.~ With display

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

111  DF  WITH USAGE MEASUREMENT (E.G., CALL OR TRAFFIC REGISTER) {3}
114  DF  .~ Call charge metering or monitoring {5}
121  DF  .~.~ At central office {4}
122.~.~.~ With display

DEFINITION

Classification: 379/122

With display:

(under subclass 121) Subject matter which produces an indication of the call charge or basis therefor.