Water shutoff for oil wells,申请号US19440549725-传众专利搜索

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发明名称	Water shutoff for oil wells
摘要
申请公布号	US2448205(A)	申请公布日期	1948.08.31
申请号	US19440549725	申请日期	1944.08.16
申请人	EDWIN ASHTON CHARLES	发明人	ASHTON CHARLES EDWIN
分类号	E21B33/128;E21B33/14	主分类号	E21B33/128
代理机构		代理人
主权项
地址

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