Method of making thread-cutting dies,申请号US19280294417-传众专利搜索

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发明名称	Method of making thread-cutting dies
摘要
申请公布号	US1773471(A)	申请公布日期	1930.08.19
申请号	US19280294417	申请日期	1928.07.21
申请人	BERG OSCAR W	发明人	BERG OSCAR W.
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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