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Patents > Patent agent : Dupont et Elluin‎ or E. Blétry & Number of figures: 4-6

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Airplane (11) · design (10) · Wings (5) · aerodynamics (5) · LTA (5) · construction (4) · stability (4) · Lift (4) · Frame (4) · None (4) · dirigibles (3) · sustentation (3) · Propulsion (3) · navigation (3)
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