Protective device for drill pipes,申请号US19350030270-传众专利搜索

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发明名称	Protective device for drill pipes
摘要
申请公布号	US2126405(A)	申请公布日期	1938.08.09
申请号	US19350030270	申请日期	1935.07.08
申请人	WEAVER MILLER HENRY CLAY	发明人	MILLER HENRY CLAY WEAVER
分类号	E21B17/10	主分类号	E21B17/10
代理机构		代理人
主权项
地址

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