Combined card and stencil for visible indexes,申请号US19270237048-传众专利搜索

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发明名称	Combined card and stencil for visible indexes
摘要
申请公布号	US1820090(A)	申请公布日期	1931.08.25
申请号	US19270237048	申请日期	1927.12.01
申请人	POLKOSNIK BERNARD L	发明人	POLKOSNIK BERNARD L.
分类号	B42F17/18	主分类号	B42F17/18
代理机构		代理人
主权项
地址

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