Index-card tab,申请号US19270174833-传众专利搜索

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发明名称	Index-card tab
摘要
申请公布号	US1763776(A)	申请公布日期	1930.06.17
申请号	US19270174833	申请日期	1927.03.12
申请人	GRAY ALBERT E N;SCHENKEIN SAMUEL M	发明人	GRAY ALBERT E. N.;SCHENKEIN SAMUEL M.
分类号	B42F21/08	主分类号	B42F21/08
代理机构		代理人
主权项
地址

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