Drilldown: Patents

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Patents > Inventor country : NL or None & Number of figures: 9-40

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airplane (9) · frame (6) · Design (5) · navigation (5) · wings (4) · propellers (4) · helicopter (4) · Propulsion (3) · Aerodynamics (3) · None (3) · construction (3) · landing (2) · stability (2) · aileron (2) · Lift (2) · propeller (2) · piloting (2)
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