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Patents > Year granted: 1920 & Tech fields : construction or propeller

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None (12) · Christian Lorenzen (3) · Louis Blériot (2) · Gustave Delage (2) · John Arthur Weis (2) · Gianni Caproni (2) · Reinhard Mannesmann (2) · Pierre-Jean-René Postel-Vinay (2) · Louis Renault (2)
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None (15)
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Related to aircraft:
CPCs:
None (12) · CPC B64C11/04 (5) · CPC B64C3/00 (4) · CPC B64C2001/0063 (4) · CPC B64C3/56 (3) · CPC B64C1/06 (3) · CPC B64C11/00 (3) · CPC B64C17/00 (2) · CPC B64D27/00 (2) · CPC B64C35/00 (2) · CPC B64C3/18 (2) · CPC B64C2001/0081 (2) · CPC B64C2700/6235 (2) · CPC B64C1/065 (2)
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