Drilldown: Patents

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Patents > Filing date: January 1913 & Number of claims: 2-8

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design (11) · airplane (11) · construction (9) · propellers (8) · frame (7) · propulsion (5) · aerodynamics (5) · LTA (5) · stability (5) · wings (4) · safety (3) · ascension (3) · sustentation (3) · helicopter (3)
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