Packer for well-testing devices,申请号US19270196758-传众专利搜索

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发明名称	Packer for well-testing devices
摘要
申请公布号	US1771556(A)	申请公布日期	1930.07.29
申请号	US19270196758	申请日期	1927.06.06
申请人	COX ERNEST H	发明人	COX ERNEST H.
分类号		主分类号
代理机构		代理人
主权项
地址

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