CIRCUIT ARRANGEMENT FOR PREVENTING ACOUSTIC FEEDBACK IN NETWORK COMMUNICATION SYSTEMS,申请号GB19770051176-传众专利搜索

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发明名称	CIRCUIT ARRANGEMENT FOR PREVENTING ACOUSTIC FEEDBACK IN NETWORK COMMUNICATION SYSTEMS
摘要
申请公布号	GB1552089(A)	申请公布日期	1979.09.05
申请号	GB19770051176	申请日期	1977.12.08
申请人	DASY INTER SA	发明人
分类号	H04M9/10;H04M1/60;H04R3/02;(IPC1-7):H04B3/20	主分类号	H04M9/10
代理机构		代理人
主权项
地址

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