Improvements in and relating to helicopters,申请号GB19460012745-传众专利搜索

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发明名称	Improvements in and relating to helicopters
摘要
申请公布号	GB607924(A)	申请公布日期	1948.09.07
申请号	GB19460012745	申请日期	1946.04.27
申请人	PIETER JACOBUS VAN POELVOORDE	发明人
分类号	B64C29/00	主分类号	B64C29/00
代理机构		代理人
主权项
地址

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