SPECIAL SERVICE CONTROL SYSTEM IN TELEPHONE EXCHANGES,申请号GB19690060184-传众专利搜索

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发明名称	SPECIAL SERVICE CONTROL SYSTEM IN TELEPHONE EXCHANGES
摘要
申请公布号	GB1269390(A)	申请公布日期	1972.04.06
申请号	GB19690060184	申请日期	1969.12.10
申请人	NIPPON TELEGRAPH AND TELEPHONE PUBLIC CORPORATION;OKI ELECTRIC INDUSTRY CO. LTD.	发明人
分类号	H04Q3/48	主分类号	H04Q3/48
代理机构		代理人
主权项
地址

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