Voice frequency selecting system,申请号GB19610035251-传众专利搜索

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发明名称	Voice frequency selecting system
摘要
申请公布号	GB949728(A)	申请公布日期	1964.02.19
申请号	GB19610035251	申请日期	1961.09.29
申请人	STANDARD TELEPHONES AND CABLES LIMITED	发明人
分类号	H04M1/50;H04Q3/42	主分类号	H04M1/50
代理机构		代理人
主权项
地址

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