USPC 244/218

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This US patent classification subclass is for patents related to "Variable lift modifier including means to change the surface area of the airfoil to be acted upon by the relatively moving stream of air."[1]

To do Clarify what Variable lift modifier means -- probably just means for controlling more or less lift.

Related concepts:


Patents in category USPC 244/218

Enclosing categories USPC 244/201
Keywords Lift, Airfoil, USPC 244/124, USPC 244/49, CPC B64C3/54, CPC Y02T50/145, CPC B64C3/546, CPC B64C31/032, CPC B64C3/56
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