Orienting device and method,申请号US19390278682-传众专利搜索

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发明名称	Orienting device and method
摘要
申请公布号	US2282431(A)	申请公布日期	1942.05.12
申请号	US19390278682	申请日期	1939.06.12
申请人	SMITH RAY W;MORRIS MCDANNALD	发明人	SMITH RAY W.;MCDANNALD MORRIS
分类号	E21B7/08;E21B47/024	主分类号	E21B7/08
代理机构		代理人
主权项
地址

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