US PATENT SUBCLASS 342 / 432
.~.~.~ With plural fixed antenna pattern comparing

Current as of: June, 1999
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342 /   HD   COMMUNICATIONS: DIRECTIVE RADIO WAVE SYSTEMS AND DEVICES (E.G., RADAR, RADIO NAVIGATION)

350  DF  DIRECTIVE {10}
385  DF  .~ Beacon or receiver {2}
417  DF  .~.~ Direction-finding receiver only {14}
432.~.~.~ With plural fixed antenna pattern comparing {5}
433  DF  .~.~.~.~> Successively commutated {3}
437  DF  .~.~.~.~> Including more than two antennas
438  DF  .~.~.~.~> Including separate indicators
439  DF  .~.~.~.~> Including combined effect indicator
440  DF  .~.~.~.~> Including a goniometer

DEFINITION

Classification: 342/432

With plural fixed antenna pattern comparing:

(under subclass 417) Subject matter wherein the receiving station provides for comparison of the energy received by a plurality of fixed directional antennas or by two antennas having dissimilar or received directional characteristics.