Drilldown: Patents

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Patents > National tech categories : AT 77d or USPC 244/119 & Number of figures: 12-40

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airplane (7) · None (4) · Propulsion (4) · Wings (4) · frame (3) · stability (3) · Flapping (3) · Aerodynamics (2) · helicopter (2) · navigation (2) · propeller (2) · design (2) · lift (2) · control (2)
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