US PATENT SUBCLASS 342 / 431
.~.~.~.~ Including a goniometer

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  DF  .~.~.~ With continuously movable antenna pattern {3}
431.~.~.~.~ Including a goniometer

DEFINITION

Classification: 342/431

Including a goniometer:

(under subclass 428) Subject matter wherein means receiving energy from two or more antennas having fixed angularly disposed directional characteristics, sets up, adjacent an orientable pick up device, singularly disposed fields whose resultant field bears a fixed angular relation to the direction of the received energy.