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Patents > Grant date: January 1911 & Family year: 1909

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airplane (13) · propeller (9) · Frame (9) · Design (8) · propulsion (8) · propellers (7) · rudder (7) · LTA (6) · stability (6) · construction (5) · safety (4) · None (4) · navigation (4) · whole (3) · parachute (3) · marine (3) · wings (3) · car (3)
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