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Patents > Year granted: 1920 & First filing: Yes & Number of claims: 4-5

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None (6) · frame (6) · airplane (5) · metal (4) · wings (4) · design (3) · subsystem (3) · aerodynamics (2) · aluminum (2) · propellers (2) · propulsion (2) · suspension (2) · dual control (2) · lift (2) · control (2) · construction (2) · sustentation (2) · biplane (2)
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CPC B64C13/12 (3) · CPC B64C3/00 (3) · CPC B64C25/06 (2) · CPC B64F2700/6226 (2)
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