TELEPHONE SPEECH NETWORK,申请号GB19770048398-传众专利搜索

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发明名称	TELEPHONE SPEECH NETWORK
摘要
申请公布号	GB1576898(A)	申请公布日期	1980.10.15
申请号	GB19770048398	申请日期	1977.11.21
申请人	NORTHERN TELECOM LTD	发明人
分类号	H04M1/58;H04M1/60;H04M1/76;(IPC1-7):H04B1/58	主分类号	H04M1/58
代理机构		代理人
主权项
地址

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