US PATENT SUBCLASS 455 / 521
.~.~.~.~ Emergency dispatch or response

Current as of: June, 1999
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455 /   HD   TELECOMMUNICATIONS

39  DF  TRANSMITTER AND RECEIVER AT SEPARATE STATIONS {14}
500  DF  .~ Plural transmitters or receivers (i.e., more than two stations) {4}
507  DF  .~.~ Central station (e.g., master, etc.) {6}
517  DF  .~.~.~ To or from mobile station {5}
521.~.~.~.~ Emergency dispatch or response

DEFINITION

Classification: 455/521

Emergency dispatch or response:

(under subclass 517) Subject matter which handles an urgent communication at either the central station or at the subscriber station.

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404, for an emergency and alarm communication in a radiotelephone system.

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379, Telephonic Communications,

37+, for emergency or alarm communication using a landline telephone.