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Patents > Inventors : Albert Hugo Friedel or Gustav Mees & Applicant firm: None

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propeller (13) · stability (13) · airplane (12) · hybrid (12) · frame (10) · propellers (9) · gyroscope (9) · None (7) · takeoff (7) · helicopter (7) · navigation (6) · design (6) · propulsion (6) · control (4) · hydroplane (4) · ascension (3) · wheels (3) · landing (3) · aerodynamics (3)
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Showing below up to 36 results in range #1 to #36.

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