DIGITAL TONE RINGER,申请号EP19810100623-传众专利搜索

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发明名称	DIGITAL TONE RINGER
摘要
申请公布号	EP0033162(A3)	申请公布日期	1981.08.19
申请号	EP19810100623	申请日期	1981.01.28
申请人	CSELT CENTRO STUDI E LABORATORI TELECOMUNICAZIONI S.P.A.	发明人	PIRA, FRANCO;PONTE, GIOVANNI
分类号	H04M1/00;H04M19/04;(IPC1-7):H04M19/04	主分类号	H04M1/00
代理机构		代理人
主权项
地址

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