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Patents > Filing date: 1910 & Patent agent : E. Blétry or Hippolyte Josse

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airplane (11) · stability (9) · lift (6) · Wings (5) · Design (5) · Sustentation (5) · subsystem (5) · propellers (5) · aerodynamics (4) · None (4) · Frame (3) · automatic stability (3) · construction (3) · propulsion (3) · Whole (3) · landing (2) · biplane (2) · navigation (2) · chassis (2) · control (2)
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