Well tool construction,申请号US19410381043-传众专利搜索

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发明名称	Well tool construction
摘要
申请公布号	US2334309(A)	申请公布日期	1943.11.16
申请号	US19410381043	申请日期	1941.02.28
申请人	BAASH-ROSS TOOL COMPANY	发明人	BROWN ORA A.
分类号	E21B17/07	主分类号	E21B17/07
代理机构		代理人
主权项
地址

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