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Patents > Year filed: 1911 & Patent agent : Dupont et Elluin or Haseltine, Lake & Co.

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airplane (10) · construction (6) · design (6) · LTA (5) · frame (5) · wings (4) · control (4) · stability (3) · Propulsion (3) · dirigibles (2) · pendulum (2) · navigation (2) · landing (2) · gyroscope (2) · fuselage (2) · None (2) · balloon (2)
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