US PATENT SUBCLASS 455 / 421
.~ Out-of-range indication

Current as of: June, 1999
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455 /   HD   TELECOMMUNICATIONS

403  DF  RADIOTELEPHONE SYSTEM {12}
421.~ Out-of-range indication

DEFINITION

Classification: 455/421

Out-of-range indication:

(under subclass 403) Subject matter wherein a visual or audible signal indicates to a mobile user that he or she is approaching or beyond a communication area.

(1) Note. This subclass may use a signal quality measurement as a parameter for an out-of-range determination.

SEE OR SEARCH THIS CLASS, SUBCLASS:

456+, for location monitoring which does not have an out-of-range signaling feature.