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Patents > Office : FR or GB or IN or NO & Grant date: 1910 & CPCs : CPC B64C23/005 or CPC B64C2700/6281 & First filing: No

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airplane (17) · design (12) · propellers (10) · propulsion (10) · None (8) · hybrid (8) · wings (7) · helicopter (6) · sustentation (6) · ascension (5) · aerodynamics (5) · Construction (4) · lift (4) · parachutes (4) · stability (4) · safety (4) · descent (3) · frame (3) · control (3)
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