US PATENT SUBCLASS 340 / 949
.~.~ Wind direction

Current as of: June, 1999
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340 /   HD   COMMUNICATIONS: ELECTRICAL

945  DF  AIRCRAFT ALARM OR INDICATING SYSTEMS {11}
947  DF  .~ Land-based landing guidance {5}
949.~.~ Wind direction

DEFINITION

Classification: 340/949

Wind direction:

(under subclass 947) Subject matter including means indicating the direction of the air currents at the landing field.

SEE OR SEARCH CLASS

73, Measuring and Testing,

170.11, for meteorology with fluid flow velocity determination.