Scratcher for wells,申请号US19490127954-传众专利搜索

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发明名称	Scratcher for wells
摘要
申请公布号	US2674317(A)	申请公布日期	1954.04.06
申请号	US19490127954	申请日期	1949.11.17
申请人	KENNETH A. WRIGHT	发明人	KIPPER STEWART A.
分类号	E21B37/02	主分类号	E21B37/02
代理机构		代理人
主权项
地址

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