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Patents > Year granted: 1910 & Patent agent : E. Blétry or Philipps & Leigh

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Airplane (10) · None (8) · stability (7) · Subsystem (5) · Lift (5) · Design (4) · Whole (3) · Sustentation (3) · Aerodynamics (3) · Wings (3) · automatic stability (3) · Chassis (2) · Control (2) · Frame (2) · propulsion (2) · propellers (2)
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