Well cementing apparatus,申请号US19420437548-传众专利搜索

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发明名称	Well cementing apparatus
摘要
申请公布号	US2330267(A)	申请公布日期	1943.09.28
申请号	US19420437548	申请日期	1942.04.03
申请人	BAKER OIL TOOLS, INC.	发明人	BURT CLARENCE E.;JR. WILLIAM S. ALTHOUSE,
分类号	E21B33/14	主分类号	E21B33/14
代理机构		代理人
主权项
地址

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