Insulated electrical connection,申请号US19340719493-传众专利搜索

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发明名称	Insulated electrical connection
摘要
申请公布号	US2000716(A)	申请公布日期	1935.05.07
申请号	US19340719493	申请日期	1934.04.07
申请人	GEOPHYSICAL SERVICE INC.	发明人	POLK JAMES V.
分类号	E21B17/02	主分类号	E21B17/02
代理机构		代理人
主权项
地址

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