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Patents > Patent agent : Dupont et Elluin or J. Germain & Number of figures: 6-30

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airplane (16) · stability (13) · construction (8) · automatic stability (7) · frame (6) · design (6) · wings (5) · aerodynamics (5) · pendulum (4) · lift (4) · control (4) · propellers (3) · gyroscope (3) · None (3)
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