US PATENT SUBCLASS 73 / 489
.~ Recording or registering interrelated factors

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

488  DF  SPEED, VELOCITY, OR ACCELERATION {29}
489.~ Recording or registering interrelated factors

DEFINITION

Classification: 73/489

(under subclass 488) Apparatus wherein the interaction of two measured variables is recorded.