Drilldown: Patents

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Patents > Office : BE or NL or None & Inventor country: BE & Family year: 1910 - 1919

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airplane (29) · design (18) · propellers (13) · propulsion (11) · sustentation (9) · hybrid (8) · helicopter (7) · wings (7) · stability (7) · construction (6) · aerodynamics (6) · lift (6) · ascension (5) · control (4) · frame (4) · safety (4)
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Showing below up to 57 results in range #1 to #57.

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