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Patents > Applicant person : Gustav Mees or Henri Bèche & Citations from after 1930: None

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hybrid (11) · stability (10) · None (9) · airplane (9) · propellers (9) · gyroscope (8) · design (6) · propeller (6) · helicopter (6) · takeoff (5) · frame (5) · control (4) · hydroplane (4) · ascension (3) · landing (3)
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