Drilldown: Patents

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Patents > Year granted: 1920 - 1929 & Tech fields : Airplane or propeller & Number of claims: 7-110

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None (10) · CPC B64C3/00 (3) · CPC B64C11/04 (3) · CPC B64C23/005 (2) · CPC B64C11/20 (2) · CPC B64C35/00 (2) · CPC B64C2700/6233 (2) · CPC B64C13/30 (2) · CPC B64C17/00 (2) · CPC B64D27/00 (2)
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