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Patents > Inventor country: US & Grant date: 1918 & Number of text pages: 3-7

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None (16) · Design (5) · stability (5) · LTA (4) · wings (4) · airplane (3) · Hydroaeroplane (3) · balloon (2) · hydroplane (2) · Hydro-aeroplane (2) · navigation (2) · control (2) · fuselage (2) · frame (2)
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