US PATENT SUBCLASS 244 / 72
.~ Beating wing

Current as of: June, 1999
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244 /   HD   AERONAUTICS

62  DF  AIRCRAFT PROPULSION {7}
72.~ Beating wing

DEFINITION

Classification: 244/72

(under subclass 62) Devices and their arrangement relative to aircraft for using the thrust produced by flapping wings for propelling aircraft.

(1) Note. Continue the search in this class, subclasses 11, 22 and 28.