US PATENT SUBCLASS 379 / 136
.~.~.~ 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}
133  DF  .~ Call traffic recording or monitoring {2}
134  DF  .~.~ At central station {4}
136.~.~.~ With display

DEFINITION

Classification: 379/136

With display:

(under subclass 134) Subject matter for producing a visual indication of the number of calls.