DIGITAL TONE RINGING UNIT,申请号JP19810009140-传众专利搜索

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发明名称	DIGITAL TONE RINGING UNIT
摘要
申请公布号	JPS56114467(A)	申请公布日期	1981.09.09
申请号	JP19810009140	申请日期	1981.01.26
申请人	CSELT CENTRO STUDI LAB TELECOM	发明人	FURANKO PIRA;GIOBUANNI PONTE
分类号	H04M1/00;H04M19/04	主分类号	H04M1/00
代理机构		代理人
主权项
地址

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