AUTOMATIC TELEPHONE EXCHANGE SYSTEMS,申请号CAD512081-传众专利搜索

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发明名称	AUTOMATIC TELEPHONE EXCHANGE SYSTEMS
摘要
申请公布号	CA512081(A)	申请公布日期	1955.04.19
申请号	CAD512081	申请日期
申请人	NORTHERN ELECTRIC COMPANY	发明人	KENNETH W. GRAYBILL;HANS SENGEBUSCH
分类号		主分类号
代理机构		代理人
主权项
地址

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