Variable-pitch propeller,申请号US19410386339-传众专利搜索

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发明名称	Variable-pitch propeller
摘要
申请公布号	US2274334(A)	申请公布日期	1942.02.24
申请号	US19410386339	申请日期	1941.04.01
申请人	ESCHER WYSS MACHINENFABRIKEN AKTIENGESELLSCHAFT	发明人	KELLER CURT
分类号	B64C11/32	主分类号	B64C11/32
代理机构		代理人
主权项
地址

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