Improvements in Pilot Bits for Earth Boring Augers,申请号GB19680044155-传众专利搜索

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发明名称	Improvements in Pilot Bits for Earth Boring Augers
摘要
申请公布号	GB1188097(A)	申请公布日期	1970.04.15
申请号	GB19680044155	申请日期	1968.09.17
申请人	WATSON MANUFACTURING COMPANY	发明人
分类号	E21B10/44	主分类号	E21B10/44
代理机构		代理人
主权项
地址

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