Apparatus for collecting drilling samples,申请号US19540458611-传众专利搜索

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发明名称	Apparatus for collecting drilling samples
摘要
申请公布号	US2728553(A)	申请公布日期	1955.12.27
申请号	US19540458611	申请日期	1954.09.27
申请人	JOHN EDWARDS	发明人	EDWARDS JOHN
分类号	E21B27/00;E21B49/00;E21B49/02	主分类号	E21B27/00
代理机构		代理人
主权项
地址

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