Method of making a hard faced cutter,申请号US19350003580-传众专利搜索

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发明名称	Method of making a hard faced cutter
摘要
申请公布号	US2057209(A)	申请公布日期	1936.10.13
申请号	US19350003580	申请日期	1935.01.26
申请人	HUGHES TOOL COMPANY	发明人	SCHLUMPF ROBERT W.
分类号	E21B10/54	主分类号	E21B10/54
代理机构		代理人
主权项
地址

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