US PATENT SUBCLASS 379 / 106.11
.~.~ Interrogation signal

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

90.01  DF  TELEPHONE LINE OR SYSTEM COMBINED WITH DIVERSE ELECTRICAL SYSTEM OR SIGNALLING (E.G., COMPOSITE) {8}
106.01  DF  .~ Remote indication over telephone line (e.g., telemetry) {4}
106.11.~.~ Interrogation signal

DEFINITION

Classification: 379/106.11

Interrogation signal:

(under subclass 106.01) Subject matter wherein the signal is transmitted to a central station in response to a request signal initiated by the central station.

SEE OR SEARCH THIS CLASS, SUBCLASS:

106.07, for interrogation signal of meter reading equipment.