US PATENT SUBCLASS 244 / 213
.~.~.~.~ By flap and/or spoiler

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.~.~.~.~ By flap and/or spoiler {2}
214  DF  .~.~.~.~.~> At leading edge
215  DF  .~.~.~.~.~> At trailing edge {2}

DEFINITION

Classification: 244/213

(under subclass 201) Variable lift modifier comprising (1) a section of the airfoil pivotable relative to a stationary portion thereof, or (2) an auxiliary element pivotally attached thereto, pivoting of the section or auxiliary element effecting a change in contour of the airfoil in sectional view.