US PATENT SUBCLASS 244 / 217
.~.~.~.~.~.~ Plural, relatively pivotable

Current as of: June, 1999
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244 /   HD   AERONAUTICS

34 R  DF  AIRCRAFT SUSTENTATION {2}
35 R  DF  .~ Sustaining airfoils {7}
198  DF  .~.~ With lift modification {3}
201  DF  .~.~.~ Variable {6}
213  DF  .~.~.~.~ By flap and/or spoiler {2}
215  DF  .~.~.~.~.~ At trailing edge {2}
217.~.~.~.~.~.~ Plural, relatively pivotable

DEFINITION

Classification: 244/217

(under subclass 215) A flap and at least one other flap also at the trailing edge, each adapted to swing about an axis substantially perpendicular to the direction of the aircraft's motion, wherein one flap overlies the other and the flaps are rotatable relative one to the other.