Apparatus for forming a closure in a well bore,申请号US19570659945-传众专利搜索

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发明名称	Apparatus for forming a closure in a well bore
摘要
申请公布号	US2969839(A)	申请公布日期	1961.01.31
申请号	US19570659945	申请日期	1957.05.17
申请人	GREENE HASKELL M	发明人	GREENE HASKELL M.
分类号	E21B33/136	主分类号	E21B33/136
代理机构		代理人
主权项
地址

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