US PATENT SUBCLASS 356 / 150
.~ Sides of angle or axes being aligned transverse to optical axis (e.g., drift meter)

Current as of: June, 1999
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356 /   HD   OPTICS: MEASURING AND TESTING

138  DF  ANGLE MEASURING OR ANGULAR AXIAL ALIGNMENT {11}
150.~ Sides of angle or axes being aligned transverse to optical axis (e.g., drift meter) {1}
151  DF  .~.~> With light pulsing or interrupting means

DEFINITION

Classification: 356/150

(under subclass 138) Subject matter where the axes being aligned or lines determining the angle being measured lie in a plane transverse to the optical axis of the measuring or aligning device.

(1) Note. One of the lines or axes may be the line generated as the result of the relative motion of a vehicle and an object as, for example, in a drift meter.