Method of preparing cards for card filing systems,申请号US19490119655-传众专利搜索

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发明名称	Method of preparing cards for card filing systems
摘要
申请公布号	US2682876(A)	申请公布日期	1954.07.06
申请号	US19490119655	申请日期	1949.10.05
申请人	MARTIN IRA W	发明人	MARTIN IRA W.
分类号	B31D1/02;B42F19/00	主分类号	B31D1/02
代理机构		代理人
主权项
地址

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