Schaltung fuer automatisches Rufsignal,申请号DE1951T004982-传众专利搜索

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发明名称	Schaltung fuer automatisches Rufsignal
摘要
申请公布号	DE892774(C)	申请公布日期	1953.10.12
申请号	DE1951T004982	申请日期	1951.10.04
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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