US PATENT SUBCLASS 342 / 428
.~.~.~ With continuously movable antenna pattern

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}
428.~.~.~ With continuously movable antenna pattern {3}
429  DF  .~.~.~.~> Including a stationary antenna
430  DF  .~.~.~.~> Including plural moving antennas
431  DF  .~.~.~.~> Including a goniometer

DEFINITION

Classification: 342/428

With continuously movable antenna pattern:

(under subclass 417) Subject matter wherein means are provided for constantly altering a direction characteristic of the receiver.

(1) Note. The alteration of the directional characteristic is frequently by rotation of a directional antenna for the receiver.

SEE OR SEARCH THIS CLASS, SUBCLASS:

398+, rotating transmitting beacons.