TUNNELING APPARATUS,申请号CAD644004-传众专利搜索

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发明名称	TUNNELING APPARATUS
摘要
申请公布号	CA644004(A)	申请公布日期	1962.07.03
申请号	CAD644004	申请日期
申请人	HUGHES TOOL COMPANY	发明人	THOMAS N. WILLIAMSON;JOHN C. HASPERT
分类号		主分类号
代理机构		代理人
主权项
地址

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