Drilldown: Patents

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Patents > Citations from after 1930: None & Number of text pages: 2-4 & Number of figures: 21-50

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None (8) · wings (5) · Airplane (5) · Design (4) · frame (4) · Propellers (4) · aerodynamics (3) · flapping (3) · Propulsion (3) · propeller (3)
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