Improvements in telephone exchange systems,申请号GB19540026205-传众专利搜索

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发明名称	Improvements in telephone exchange systems
摘要
申请公布号	GB768953(A)	申请公布日期	1957.02.27
申请号	GB19540026205	申请日期	1954.09.09
申请人	TELEPHONE MANUFACTURING COMPANY LIMITED	发明人	FOSTER WILLIAM GORDON
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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