US PATENT SUBCLASS 73 / 170.04
.~ Using a drifter or tracer (e.g., smoke)
Current as of:
June, 1999
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73 /
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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.