US PATENT SUBCLASS 73 / 170.04
.~ Using a drifter or tracer (e.g., smoke)


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

170.01  DF  FLUID FLOW DIRECTION (E.G., WIND SOCK, WEATHER VANE, ETC.) {4}
170.04.~ Using a drifter or tracer (e.g., smoke)


DEFINITION

Classification: 73/170.04

Using a drifter or tracer (e.g., smoke):

(under subclass 170.01) Subject matter wherein the determination is made by detecting a body or a substance introduced into and carried by the fluid.

SEE OR SEARCH THIS CLASS, SUBCLASS:

861.05, 861.07, for using a tracer or a tag for measuring the volume or rate of flow of a fluid, per se.