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Patents > Patent agent : J. A. Lehmann; Unclear or Weismann et Marx & Number of figures: 1-3

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airplane (9) · control (7) · design (5) · frame (5) · propellers (5) · construction (4) · steering (4) · hydrodynamics (3) · aerodynamics (3) · navigation (3) · subsystem (3) · propulsion (3) · chassis (3)
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