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Patents > Patent agent : E. Blétry or Henry Lucke & Number of text pages: 3-4

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stability (11) · airplane (8) · aerodynamics (6) · design (5) · None (4) · subsystem (4) · propulsion (4) · propellers (4) · wings (4) · propeller (3) · LTA (3) · automatic stability (3) · sustentation (2) · navigation (2) · control (2) · pistons (2) · lift (2)
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