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Patents > Publication date: 1922

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airplane (16) · propellers (13) · frame (9) · construction (9) · design (9) · subsystem (8) · control (5) · aerodynamics (5) · fuselage (5) · motors (4) · LTA (4) · None (3) · wings (3) · propulsion (3) · propeller (3) · metal (3) · chassis (3)
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