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Patents > National tech categories : AT 77d or USPC 244/80 & Citations from after 1930: None & Number of figures: 11-30

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stability (8) · wings (5) · airplane (5) · propulsion (5) · navigation (4) · propeller (4) · flapping (3) · automatic stability (3) · control (3) · Design (3) · frame (3) · aerodynamics (2) · HTA (2) · Helicopter (2) · safety (2) · LTA (2)
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