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Patents > Patent agent : David H. Fletcher or E. Blétry & Number of claims: 4-6

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design (9) · airplane (8) · stability (6) · propulsion (5) · propellers (5) · wings (4) · Whole (4) · aerodynamics (4) · lift (3) · None (3) · construction (3) · control (2) · automatic stability (2) · biplane (2) · Chassis (2) · orthopter (2) · LTA (2) · Frame (2)
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