IMPROVEMENTS RELATING TO TELEPHONE EXCHANGES,申请号GB19690062827-传众专利搜索

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发明名称	IMPROVEMENTS RELATING TO TELEPHONE EXCHANGES
摘要
申请公布号	GB1276707(A)	申请公布日期	1972.06.07
申请号	GB19690062827	申请日期	1969.12.24
申请人	THE PLESSEY COMPANY LIMITED	发明人	DONALD REANEY
分类号	H04M3/44;H04Q3/42	主分类号	H04M3/44
代理机构		代理人
主权项
地址

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