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Patents > Patent agent : Herbert Haddan & Co. or Victor J. Evans & Family year: 1900 - 1909

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Frame (10) · navigation (8) · stability (8) · airplane (7) · control (6) · None (5) · rudder (5) · propulsion (5) · LTA (5) · takeoff (4) · propeller (4) · balloon (4) · design (4) · wheels (3) · propellers (3) · flapping (3) · helicopter (3) · wings (3) · airfoil (3)
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