Sleeve packer construction,申请号US19350029294-传众专利搜索

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发明名称	Sleeve packer construction
摘要
申请公布号	US2125665(A)	申请公布日期	1938.08.02
申请号	US19350029294	申请日期	1935.07.01
申请人	M. O. JOHNSTON	发明人	BETTIS WILBUR F.
分类号	E21B33/12	主分类号	E21B33/12
代理机构		代理人
主权项
地址

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