Improvements in or relating to helicopters,申请号GB19450034261-传众专利搜索

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发明名称	Improvements in or relating to helicopters
摘要
申请公布号	GB606818(A)	申请公布日期	1948.08.20
申请号	GB19450034261	申请日期	1945.12.18
申请人	UNITED AIRCRAFT CORPORATION	发明人
分类号	B64C27/54	主分类号	B64C27/54
代理机构		代理人
主权项
地址

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