Scratchers for well bores,申请号GB19560008349-传众专利搜索

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发明名称	Scratchers for well bores
摘要
申请公布号	GB789047(A)	申请公布日期	1958.01.15
申请号	GB19560008349	申请日期	1956.03.16
申请人	BAKER OIL TOOLS, INC.	发明人	BAKER JOHN RAYMOND
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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