US PATENT SUBCLASS 73 / 170.02
.~ Relative to aircraft or watercraft

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}
170.02.~ Relative to aircraft or watercraft {1}
170.03  DF  .~.~> Sailboat (e.g., sailing aid)

DEFINITION

Classification: 73/170.02

Relative to aircraft or watercraft:

(under subclass 170.01) Subject matter comprising a process or an apparatus for determining the direction of flow of fluid relative to an aircraft or watercraft.