CONTROL SYSTEM OF COMMUTATION SIGNALS IN TELEPHONE LINK,申请号PL19800227694-传众专利搜索

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发明名称	CONTROL SYSTEM OF COMMUTATION SIGNALS IN TELEPHONE LINK
摘要
申请公布号	PL130733(B1)	申请公布日期	1984.09.29
申请号	PL19800227694	申请日期	1980.11.05
申请人		发明人
分类号	H03K17/78;H04M;H04M3/22;H04Q3/52;(IPC1-7):H04Q3/52	主分类号	H03K17/78
代理机构		代理人
主权项
地址

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