Drilldown: Patents

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Patents > Year filed: 1910 - 1919 & Inventor country: DE & Number of figures: 12-40

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airplane (11) · stability (8) · None (7) · wings (6) · Frame (5) · Design (5) · lift (4) · sustentation (4) · aerodynamics (4) · Flapping (4) · Propulsion (3) · control (3) · propellers (3)
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