PCM TONE SIGNAL GENERATOR,申请号GB19800004802-传众专利搜索

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发明名称	PCM TONE SIGNAL GENERATOR
摘要
申请公布号	GB2044040(A)	申请公布日期	1980.10.08
申请号	GB19800004802	申请日期	1980.02.13
申请人	NORTHERN TELECOM LTD	发明人
分类号	H04Q1/45;H04J3/10;H04J3/12;H04M19/02;H04Q1/457;H04Q11/04;(IPC1-7):H04Q11/04;H04M1/50	主分类号	H04Q1/45
代理机构		代理人
主权项
地址

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