DIGITAL VOICE SIGNAL TRANSMISSION SYSTEM,申请号GB19750052957-传众专利搜索

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发明名称	DIGITAL VOICE SIGNAL TRANSMISSION SYSTEM
摘要
申请公布号	GB1530632(A)	申请公布日期	1978.11.01
申请号	GB19750052957	申请日期	1975.12.29
申请人	IBM CORP	发明人
分类号	H03M3/02;G10L19/00;H04B3/20;H04B14/06;H04J3/17;(IPC1-7):H03K13/22	主分类号	H03M3/02
代理机构		代理人
主权项
地址

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