Relay controlled cross bar switch and telephone system,申请号GB19480003547-传众专利搜索

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发明名称	Relay controlled cross bar switch and telephone system
摘要
申请公布号	GB670695(A)	申请公布日期	1952.04.23
申请号	GB19480003547	申请日期	1948.02.06
申请人	AUTOMATIC ELECTRIC LABORATORIES, INC.	发明人
分类号	H01H67/26;H04Q3/00	主分类号	H01H67/26
代理机构		代理人
主权项
地址

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