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Patents > Grant date: 1920 & IPCs: None & Number of figures: 1-2

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airplane (10) · motors (5) · subsystem (5) · design (4) · Biplane (4) · construction (4) · airship (3) · aerodynamics (3) · stability (2) · propellers (2) · frame (2) · wing (2) · propulsion (2)
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