ARANGEMENT FOR VOICE-FREQUENCY SIGNALLING, E.G. FOR A TELEPHONE SYSTEM,申请号GB19690054083-传众专利搜索

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发明名称	ARANGEMENT FOR VOICE-FREQUENCY SIGNALLING, E.G. FOR A TELEPHONE SYSTEM
摘要
申请公布号	GB1281934(A)	申请公布日期	1972.07.19
申请号	GB19690054083	申请日期	1969.11.04
申请人	TELEFONAKTIEBOLAGET L M ERICSSON	发明人
分类号	H04M1/50;H04Q3/00	主分类号	H04M1/50
代理机构		代理人
主权项
地址

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