Means for locating leaks in well tubing,申请号US19280308495-传众专利搜索

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发明名称	Means for locating leaks in well tubing
摘要
申请公布号	US1812943(A)	申请公布日期	1931.07.07
申请号	US19280308495	申请日期	1928.09.26
申请人	GRANGER PAUL H	发明人	GRANGER PAUL H.
分类号	E21B47/10	主分类号	E21B47/10
代理机构		代理人
主权项
地址

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