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Patents > National tech categories : USPC 244/45R or USPC 416/89, 416/168R & Citations from after 1930: None

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stability (14) · airplane (14) · frame (10) · airfoil (7) · wheels (4) · propeller (4) · design (4) · wings (3) · rudder (3) · control (3) · navigation (3) · structure (2) · skids (2) · safety (2) · propellers (2) · None (2) · aerodynamics (2) · automatic stability (2) · biplane (2)
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Showing below up to 27 results in range #1 to #27.

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