Record perforating machine,申请号US19290342023-传众专利搜索

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发明名称	Record perforating machine
摘要
申请公布号	US1836971(A)	申请公布日期	1931.12.15
申请号	US19290342023	申请日期	1929.02.23
申请人	AMERICAN AUTOMATIC TYPEWRITER CO.	发明人	HILL PAUL E.;MATTHIESSEN IRA C.
分类号		主分类号
代理机构		代理人
主权项
地址

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