US PATENT SUBCLASS 73 / 170.05
.~ Using a fluid actuated alignment device (e.g., wind sock, weather vane, etc.)

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}
170.05.~ Using a fluid actuated alignment device (e.g., wind sock, weather vane, etc.) {3}
170.06  DF  .~.~> With illumination means or an electro-optical indicator (e.g., beacon or signal lamp)
170.07  DF  .~.~> With velocity determination {1}
170.09  DF  .~.~> Electric sensor

DEFINITION

Classification: 73/170.05

Using a fluid actuated alignment device (e.g., wind sock, weather vane, etc.):

(under subclass 170.01) Subject matter comprising a means responsive to the fluid flow which aligns itself in the direction of flow of the fluid.