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Patents > IPCs : IPC B64C27/04 or IPC B64D7/04 & First filing: No

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propellers (15) · propulsion (15) · helicopter (14) · Airplane (13) · hybrid (11) · ascension (10) · design (9) · None (5) · frame (5) · sustentation (5) · lift (5) · propeller (4) · Wings (4) · construction (4) · landing (3) · wheels (3) · parachutes (3)
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Showing below up to 37 results in range #1 to #37.

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