Plug and valve device for casing apparatus,申请号US19490127190-传众专利搜索

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发明名称	Plug and valve device for casing apparatus
摘要
申请公布号	US2651368(A)	申请公布日期	1953.09.08
申请号	US19490127190	申请日期	1949.11.14
申请人	BAKER OIL TOOLS, INC.	发明人	BAKER REUBEN C.;AUSTIN BENJAMIN LEWIS
分类号	E21B34/14	主分类号	E21B34/14
代理机构		代理人
主权项
地址

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