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Patents > Year filed: 1911 & Patent agent : E. Blétry or Haseltine, Lake & Co.

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airplane (11) · stability (8) · control (5) · aerodynamics (4) · design (4) · wings (3) · LTA (3) · subsystem (3) · automatic stability (3) · propulsion (3) · pistons (2) · gyroscope (2) · frame (2) · propellers (2) · pendulum (2) · navigation (2) · balloon (2) · aeroplane (2)
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