Drilldown: Patents

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Patents > Year granted: 1912 & Filing date: February 1912 & Number of figures: 2-5

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airplane (7) · propeller (6) · propulsion (5) · None (4) · helicopter (4) · aerodynamics (4) · frame (3) · safety (3) · construction (3) · LTA (3) · stability (2) · propellers (2) · piloting (2) · navigation (2) · mooring (2) · landing (2) · wings (2)
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