US PATENT SUBCLASS 455 / 526
.~.~.~ Plural receivers tuned to common frequency

Current as of: June, 1999
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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}
526.~.~.~ Plural receivers tuned to common frequency

DEFINITION

Classification: 455/526

Plural receivers tuned to common frequency:

(under subclass 507) Subject matter in which all or a subgroup of satellite receivers are tuned to a common carrier wave signal frequency.

(1) Note. For example, tuning to a traffic broadcasting or tornado warning over a radio frequency, etc.