US PATENT SUBCLASS 342 / 144
.~.~.~.~ PPI type

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

118  DF  DETERMINING DISTANCE {11}
134  DF  .~ With pulse modulation {4}
139  DF  .~.~ Combined with determining direction {3}
142  DF  .~.~.~ With CRT display {2}
144.~.~.~.~ PPI type

DEFINITION

Classification: 342/144

PPI type:

(under subclass 142) Subject matter wherein the display represents the signal as a bright spot, with range indicated by the distance of the spot from the center of the screen and the bearing by the radial angle of the spot.