US PATENT SUBCLASS 324 / 175
.~.~ Including radiant energy detector

Current as of: June, 1999
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324 /   HD   ELECTRICITY: MEASURING AND TESTING

160  DF  ELECTRICAL SPEED MEASURING {7}
166  DF  .~ Including speed-related frequency generator {5}
175.~.~ Including radiant energy detector

DEFINITION

Classification: 324/175

(under subclass 166) Subject matter in which means for producing a speed signal includes means responsive to radiant

energy (i.e., electromagnetic or atomic radiation) to produce or alter an electric current.