Process for making threading dies,申请号US19390271014-传众专利搜索

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发明名称	Process for making threading dies
摘要
申请公布号	US2208811(A)	申请公布日期	1940.07.23
申请号	US19390271014	申请日期	1939.05.01
申请人	UNION TWIST DRILL COMPANY	发明人	KIEHNE ALFRED J.
分类号	B23P15/48	主分类号	B23P15/48
代理机构		代理人
主权项
地址

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