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Patents > Filing date: 1912 & Grant date: December 1913

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airplane (10) · None (4) · construction (4) · design (4) · stability (3) · Propellers (3) · Fuselage (3) · subsystem (2) · safety (2) · propulsion (2) · Parachute (2) · instrument (2) · control (2) · LTA (2) · wings (2) · Airship (2)
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