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Patents > IPCs : IPC B64C23/00 or IPC B64C29/0025 & Family year: 1908

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Propulsion (10) · hybrid (9) · Airplane (8) · Ascension (7) · Design (6) · Propellers (6) · helicopter (6) · sustentation (5) · lift (5) · None (4) · propeller (4) · Frame (4) · wings (4) · aerodynamics (4) · parachutes (3) · descent (3) · Control (3) · safety (3)
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Showing below up to 21 results in range #1 to #21.

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