Method of making drawing dies,申请号US19370180078-传众专利搜索

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发明名称	Method of making drawing dies
摘要
申请公布号	US2212394(A)	申请公布日期	1940.08.20
申请号	US19370180078	申请日期	1937.12.16
申请人	CARBOLOY COMPANY, INC.	发明人	ENGLE EDGAR W.;DUNCAN HERSHEL BRYAN
分类号	B21C3/18	主分类号	B21C3/18
代理机构		代理人
主权项
地址

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