File cutting apparatus and method of making files,申请号US19270186477-传众专利搜索

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发明名称	File cutting apparatus and method of making files
摘要
申请公布号	US1829385(A)	申请公布日期	1931.10.27
申请号	US19270186477	申请日期	1927.04.25
申请人	HELLER BROTHERS COMPANY	发明人	ANHEUSER ERNEST A.
分类号	B23D73/00	主分类号	B23D73/00
代理机构		代理人
主权项
地址

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