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Patents > Patent agent: E. Blétry & National tech categories: FR 6.4 & Number of text pages: 3-11

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airplane (12) · stability (11) · wings (7) · design (7) · aerodynamics (6) · automatic stability (4) · propulsion (4) · LTA (4) · lift (4) · sustentation (3) · subsystem (3) · propellers (3) · None (3) · control (3)
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