US PATENT SUBCLASS 244 / 205
.~.~.~.~.~ With ionic or electrostatic surface

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  DF  .~.~.~.~ By controlling boundary layer {6}
205.~.~.~.~.~ With ionic or electrostatic surface

DEFINITION

Classification: 244/205

(under subclass 204) Boundary layer control means comprising means to create and/or vary an electric field about the airfoil.