US PATENT SUBCLASS 73 / 500
.~ Liquid surface is or moves reading means

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

488  DF  SPEED, VELOCITY, OR ACCELERATION {29}
500.~ Liquid surface is or moves reading means {1}
501  DF  .~.~> Surface of revolving liquid body

DEFINITION

Classification: 73/500

(under subclass 488) Apparatus wherein a liquid surface actuates a speed condition reading means or itself indicates the speed value.