US PATENT SUBCLASS 244 / 199
.~.~.~ By vortex generator or dissipator

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}
199.~.~.~ By vortex generator or dissipator

DEFINITION

Classification: 244/199

(under subclass 198) Lift modification devices designed to create or disperse a swirling air flow, this flow either circulating about the surface of the airfoil or flowing radially therefrom.