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Patents > Year granted: 1919 & Filing date: 1915

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airplane (21) · None (11) · frame (9) · Construction (6) · Propellers (6) · LTA (6) · military (5) · propulsion (5) · stability (5) · whole (4) · design (4) · fuselage (3) · fabric (3) · Dirigibles (3) · envelope (3) · automatic stability (3) · subsystem (3) · biplane (3)
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