Drill rod with adapter,申请号US19470760373-传众专利搜索

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法人/股东/高管

发明名称	Drill rod with adapter
摘要
申请公布号	US2569275(A)	申请公布日期	1951.09.25
申请号	US19470760373	申请日期	1947.07.11
申请人	THE TIMKEN ROLIER BEARING COMPANY	发明人	BAKER JOHN B.
分类号	E21B17/04	主分类号	E21B17/04
代理机构		代理人
主权项
地址

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