Discriminating circuits for dualpurpose trunks,申请号US19510254843-传众专利搜索

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发明名称	Discriminating circuits for dualpurpose trunks
摘要
申请公布号	US2682577(A)	申请公布日期	1954.06.29
申请号	US19510254843	申请日期	1951.11.05
申请人	INTERNATIONAL TELEPHONE AND TELEGRAPH CORPORATION	发明人	HUTTON ROBERT W.
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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