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Patents > Patent agent : E. Blétry or Victor J. Evans & Number of diagram pages: 2

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airplane (9) · frame (6) · stability (6) · propeller (5) · None (4) · navigation (4) · safety (3) · rudder (3) · Propulsion (3) · wings (3) · control (2) · gyroscope (2) · whole (2) · takeoff (2) · sustentation (2) · parachute (2)
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