Core taking device,申请号US19340710193-传众专利搜索

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发明名称	Core taking device
摘要
申请公布号	US2020856(A)	申请公布日期	1935.11.12
申请号	US19340710193	申请日期	1934.02.07
申请人	SCHLUMBERGER WELL SURVEYING CORPORATION	发明人	SCHLUMBERGER CONRAD
分类号	E21B49/06;E21B49/10	主分类号	E21B49/06
代理机构		代理人
主权项
地址

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