Cement retainer and bridge plug for well casings,申请号US19360105041-传众专利搜索

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发明名称	Cement retainer and bridge plug for well casings
摘要
申请公布号	US2121002(A)	申请公布日期	1938.06.21
申请号	US19360105041	申请日期	1936.10.10
申请人	BAKER OIL TOOLS, INC.	发明人	BAKER REUBEN C.
分类号	E21B33/134	主分类号	E21B33/134
代理机构		代理人
主权项
地址

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