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Patents > Filing date: 1909 & Patent agent : Dupont et Elluin or E. Blétry or L. Chassevent or Weismann et Marx

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airplane (15) · Design (12) · Propulsion (8) · Control (7) · Construction (6) · Subsystem (6) · frame (5) · Aerodynamics (5) · Wings (5) · stability (4) · rudder (4) · None (4) · Chassis (3) · lift (3) · ornithopter (3) · monoplane (3) · sustentation (3)
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Showing below up to 39 results in range #1 to #39.

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