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Patents > Year filed: 1912 & Grant date: December 1913

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airplane (9) · None (4) · construction (4) · Design (4) · propellers (3) · fuselage (3) · LTA (3) · balloon (2) · instrument (2) · subsystem (2) · stability (2) · Propulsion (2) · parachute (2) · wings (2) · control (2) · Airship (2)
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