Perfectionnements aux hélices à pas variable pour aéronefs,申请号FRD851847-传众专利搜索

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发明名称	Perfectionnements aux hélices à pas variable pour aéronefs
摘要
申请公布号	FR851847(A)	申请公布日期	1940.01.16
申请号	FRD851847	申请日期	1939.03.18
申请人	ROLLS-ROYCE LIMITED	发明人
分类号	B64D31/12	主分类号	B64D31/12
代理机构		代理人
主权项
地址

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