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Patents > Office : ?? or AT or FR or IN or SE & Publication date: 1910 & CPCs : CPC B64C23/005 or CPC B64C39/08

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airplane (20) · propellers (11) · design (11) · hybrid (9) · propulsion (8) · helicopter (7) · Ascension (7) · sustentation (6) · frame (5) · aerodynamics (5) · stability (5) · Construction (4) · Control (4) · takeoff (4) · parachutes (4) · whole (4) · wings (4) · safety (4) · descent (4)
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Showing below up to 26 results in range #1 to #26.

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