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Patents > Applicant person : Gustav Mees or Henri-Hubert Pagny & Number of text pages: 2-4

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None (10) · airplane (9) · hybrid (9) · stability (8) · propellers (7) · propeller (6) · helicopter (5) · gyroscope (5) · frame (4) · takeoff (4) · design (4) · hydroplane (4) · ascension (3) · wheels (2) · landing (2) · aerodynamics (2) · whole (2) · control (2) · flotation (2)
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