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Patents > Office: FR & First filing: No & Number of text pages: 8-30

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airplane (13) · design (6) · propulsion (6) · stability (5) · frame (5) · construction (5) · propellers (4) · None (3) · Safety (3) · propeller (3) · aerodynamics (3) · HTA (3) · flapping (3) · hybrid (3) · biplane (3)
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