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Patents > Filing date: 1912 & National tech categories: BE K & Citations from after 1930: None

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airplane (15) · stability (6) · design (6) · construction (5) · wings (4) · propellers (4) · equilibrium (4) · hybrid (4) · Sustentation (3) · suspension (3) · propulsion (3) · hydroplane (3) · helicopter (2) · takeoff (2) · LTA (2) · Lift (2) · aerodynamics (2) · chassis (2) · ascension (2) · control (2)
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