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Patents > Year granted: 1921 & Granted: Yes & Number of figures: 7-9

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airplane (9) · wings (4) · design (4) · heavier-than-air (3) · biplane (3) · longerons (3) · aerial propeller (2) · hydroaeroplane (2) · subsystem (2) · marine (2) · construction (2) · Aerodynamics (2) · stability (2) · frame (2) · spars (2) · lift (2) · landing (2)
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