Connection for automatic ring signal,申请号US19510251486-传众专利搜索

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发明名称	Connection for automatic ring signal
摘要
申请公布号	US2815404(A)	申请公布日期	1957.12.03
申请号	US19510251486	申请日期	1951.10.16
申请人	TELEFONAKTIEBOLAGET L M ERICSSON	发明人	NILSSON NILS EMIL
分类号	H04Q3/00	主分类号	H04Q3/00
代理机构		代理人
主权项
地址

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