Drilldown: Patents

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Patents > Filing date: April 1909 & Related to aircraft: Yes

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Airplane (17) · Propellers (12) · Design (10) · Stability (9) · Lift (9) · Frame (9) · None (8) · propulsion (8) · control (8) · Wings (6) · Construction (6) · Subsystem (5) · propeller (3) · aerodynamics (3) · LTA (3) · sustentation (3) · Whole (3)
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