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Patents > Applicant person : Antoine-Padoue Filippi or Gustav Mees or John Arthur Armstrong

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propellers (23) · propulsion (17) · Airplane (15) · stability (12) · hybrid (11) · propeller (11) · None (10) · subsystem (9) · design (8) · gyroscope (8) · helicopter (7) · aerodynamics (6) · ascension (5) · frame (5) · takeoff (5) · marine (5)
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None (25)
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Showing below up to 65 results in range #1 to #65.

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