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Patents > Year granted: 1910 & CPCs : CPC B64C11/30 or CPC B64C2700/6274

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airplane (11) · propellers (10) · None (9) · design (9) · propulsion (7) · ascension (5) · hybrid (5) · control (4) · helicopter (4) · sustentation (4) · whole (4) · wings (4) · stability (3) · descent (3) · aerodynamics (3) · propeller (3) · frame (3) · parachutes (3)
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Showing below up to 33 results in range #1 to #33.

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