US PATENT SUBCLASS 342 / 69
.~ Device actuated by presence of land vehicle

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

61  DF  RETURN SIGNAL CONTROLS EXTERNAL DEVICE {7}
69.~ Device actuated by presence of land vehicle

DEFINITION

Classification: 342/69

Device actuated by presence of land vehicle:

(under subclass 61) Subject matter including means controlled by a return signal indicative of the presence of a land vehicle.

SEE OR SEARCH THIS CLASS, SUBCLASS:

27+, for radar presence detection, per se.