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Patents > Year granted: 1910 & CPCs : CPC B64C 39/08 or CPC B64C2700/6274

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airplane (12) · None (9) · design (9) · propellers (9) · ascension (5) · propulsion (5) · whole (4) · stability (4) · hybrid (4) · helicopter (4) · frame (4) · control (4) · sustentation (4) · parachutes (3) · descent (3) · safety (3) · aerodynamics (3) · wings (3)
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Showing below up to 27 results in range #1 to #27.

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