Circuit-arrangement for use in automatic telephone systems,申请号US19530335836-传众专利搜索

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发明名称	Circuit-arrangement for use in automatic telephone systems
摘要
申请公布号	US2790030(A)	申请公布日期	1957.04.23
申请号	US19530335836	申请日期	1953.02.09
申请人	NORTH AMERICAN PHILIPS COMPANY, INC.	发明人	SIX WILLEM;DOMBURG JACOBUS
分类号	H04Q3/52	主分类号	H04Q3/52
代理机构		代理人
主权项
地址

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