(under subclass 34) Support providing means comprising an element, of the type commonly called a wing, plane, or blade, having a surface designed to be acted upon by a relatively moving stream of air to support the aircraft, a leading edge upstream and a trailing edge downstream, a theoretical chord line connecting the two edges, an upper surface when viewed planwise from above the chord line, and a lower surface when viewed planwise from below the chord line.
(1) Note. This subclass contains airfoils in which the novelty is in the shape of the individual airfoil, either in cross-section or in plan view.
(2) Note. The search should be continued in this class, subclass 45, which is devoted to the arrangement of airfoils, with respect to each other or to the body upon which they are mounted, but which contains many incidental disclosures of airfoils of unusual shape.
SEE OR SEARCH THIS CLASS, SUBCLASS:
123, 124, for the construction of airfoils such as internal bracing, etc.
