Drilldown: Patents

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Patents > Year filed: 1911 & Patent agent : E. Blétry or Victor J. Evans

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stability (12) · airplane (8) · None (6) · automatic stability (5) · control (4) · aerodynamics (4) · propulsion (3) · propeller (3) · design (3) · subsystem (2) · wheels (2) · rudder (2) · gyroscope (2) · propellers (2) · pistons (2) · hybrid (2) · helicopter (2) · wings (2) · equilibrium (2) · aeroplane (2)
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