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Patents > Patent agent : Dupont et Elluin or Haseltine, Lake & Co. & Number of text pages: 6-40

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stability (11) · airplane (6) · gyroscope (5) · frame (4) · marine (4) · propeller (4) · electricity (3) · propulsion (3) · Automatic stability (3) · navigation (3) · LTA (2) · hydroplane (2) · military (2) · hydroaeroplane (2) · hybrid (2) · Helicopter (2) · magnet (2) · steering (2) · rudder (2)
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