US PATENT SUBCLASS 342 / 98
.~.~ Frequency

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

73  DF  RETURN SIGNAL CONTROLS RADAR SYSTEM {3}
89  DF  .~ Receiver {4}
98.~.~ Frequency {2}
99  DF  .~.~.~> Doppler frequency tracking {2}
102  DF  .~.~.~> Phase {1}

DEFINITION

Classification: 342/98

Frequency:

(under subclass 89) Subject matter including control of the receiver frequency.

SEE OR SEARCH THIS CLASS, SUBCLASS:

81, for return signal control of antenna beam direction by frequency control.