ELECTRONIC HOLD CIRCUIT FOR A TWO-WAY TELEPHONE SET FED BY THE SUBSCRIBER LINE,申请号EP19870113137-传众专利搜索

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发明名称	ELECTRONIC HOLD CIRCUIT FOR A TWO-WAY TELEPHONE SET FED BY THE SUBSCRIBER LINE
摘要
申请公布号	EP0263972(A3)	申请公布日期	1989.06.07
申请号	EP19870113137	申请日期	1987.09.08
申请人	SIEMENS AKTIENGESELLSCHAFT BERLIN UND MUNCHEN	发明人	STRZELETZ, WOLFGANG, DIPL.-ING.
分类号	H04M3/58;H04M9/00;(IPC1-7):H04M3/58	主分类号	H04M3/58
代理机构		代理人
主权项
地址

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