US PATENT SUBCLASS 244 / 204
.~.~.~.~ By controlling boundary layer

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}
204.~.~.~.~ By controlling boundary layer {6}
205  DF  .~.~.~.~.~> With ionic or electrostatic surface
206  DF  .~.~.~.~.~> With rotating member
207  DF  .~.~.~.~.~> With blowing {1}
209  DF  .~.~.~.~.~> With suction
210  DF  .~.~.~.~.~> With nose slot {1}
212  DF  .~.~.~.~.~> Having trailing edge flap

DEFINITION

Classification: 244/204

(under subclass 201) Variable lift modifier comprising means within the airfoil, or externally adjacent the surface and

upstream of the trailing edge, intended to affect a flow characteristic of that portion of the stream of air which is immediately adjacent the surface of the airfoil.