Visual selective directory,申请号US19500146980-传众专利搜索

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发明名称	Visual selective directory
摘要
申请公布号	US2688741(A)	申请公布日期	1954.09.07
申请号	US19500146980	申请日期	1950.03.01
申请人	SALTARELLI CEDIO S	发明人	SALTARELLI CEDIO S.
分类号	G09B29/10	主分类号	G09B29/10
代理机构		代理人
主权项
地址

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