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Patents > CPCs: CPC B64C2700/6274 & Family year: 1900 - 1909 & Number of text pages: 3-20000000

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design (9) · Propulsion (9) · airplane (9) · propellers (7) · None (6) · lift (6) · helicopter (5) · wings (5) · ascension (5) · hybrid (4) · sustentation (4) · control (4) · stability (4) · aerodynamics (4) · motors (3)
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Showing below up to 27 results in range #1 to #27.

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