US PATENT SUBCLASS 340 / 435
.~ Of relative distance from an obstacle

Current as of: June, 1999
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340 /   HD   COMMUNICATIONS: ELECTRICAL

425.5  DF  LAND VEHICLE ALARMS OR INDICATORS {11}
435.~ Of relative distance from an obstacle

DEFINITION

Classification: 340/435

Of relative distance from an obstacle:

(under subclass 425.5) Subject matter including indicators which enable a driver to estimate the relative distance to an obstacle such as another vehicle.