Drilldown: Patents

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Patents > Year filed: 1908 & Grant date: 1909 & CPCs : CPC B64C23/005 or CPC B64C2700/6256

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None (5) · helicopter (5) · propulsion (4) · airplane (4) · lift (4) · control (3) · sustentation (3) · Hybrid (3) · design (3) · wings (3) · Aerodynamics (3) · ascension (3) · subsystem (2) · steering (2) · frame (2) · motors (2)
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Showing below up to 17 results in range #1 to #17.

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