US PATENT SUBCLASS 342 / 439
.~.~.~.~ Including combined effect indicator

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  DF  .~.~.~ With plural fixed antenna pattern comparing {5}
439.~.~.~.~ Including combined effect indicator

DEFINITION

Classification: 342/439

Including combined effect indicator:

(under subclass 432) Subject matter wherein comparison is made by a single indicating device which is responsive to at least two of the quantities to be compared.