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Patents > Inventor country: US & Grant date: December 1911 & Citations from after 1930: None

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None (17) · frame (9) · airplane (7) · stability (5) · navigation (4) · propeller (4) · rudder (4) · heavier-than-air (3) · marine (2) · propulsion (2) · whole (2) · wheels (2) · balance (2) · propellers (2) · design (2) · LTA (2) · construction (2) · takeoff (2)
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