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Patents > Patent agent : E. Blétry or Henry Lucke & Number of claims: 4-6

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design (8) · airplane (8) · stability (6) · None (5) · propulsion (5) · propellers (5) · whole (4) · wings (4) · construction (3) · lift (3) · aerodynamics (3) · orthopter (2) · control (2) · automatic stability (2) · biplane (2) · frame (2) · chassis (2)
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