Improvements in or relating to rotary drilling tool with rolling cutters,申请号GB19360022044-传众专利搜索

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发明名称	Improvements in or relating to rotary drilling tool with rolling cutters
摘要
申请公布号	GB476130(A)	申请公布日期	1937.12.02
申请号	GB19360022044	申请日期	1936.08.10
申请人	JOHN ADOLPHUS ZUBLIN	发明人
分类号	E21B10/08;E21B10/18	主分类号	E21B10/08
代理机构		代理人
主权项
地址

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