Perfectionnements apportés aux hélices aériennes à pas variable,申请号FRD845712-传众专利搜索

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发明名称	Perfectionnements apportés aux hélices aériennes à pas variable
摘要
申请公布号	FR845712(A)	申请公布日期	1939.08.31
申请号	FRD845712	申请日期	1938.11.07
申请人	THE DE HAVILLAND AIRCRAFT COMPANY LIMITED	发明人
分类号	B64C11/42	主分类号	B64C11/42
代理机构		代理人
主权项
地址

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