Drilldown: Patents

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Patents > Year filed: 1913 & Granted: Yes & National tech categories: BE K

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airplane (11) · design (6) · propellers (6) · hybrid (6) · stability (4) · Frame (4) · fuselage (3) · construction (3) · control (3) · wings (3) · helicopter (3) · propulsion (2) · ascension (2) · parachute (2) · navigation (2) · sustentation (2)
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Showing below up to 18 results in range #1 to #18.

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