ELECTRONIC TONE RINGER.,申请号EP19840900822-传众专利搜索

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发明名称	ELECTRONIC TONE RINGER.
摘要
申请公布号	EP0135538(A4)	申请公布日期	1987.12.08
申请号	EP19840900822	申请日期	1984.01.30
申请人	AMERICAN TELEPHONE AND TELEGRAPH COMPANY	发明人	EMBREE, DAVID, MARLIN;GOLDTHORP, DAVID, CLAYTON;LONGENECKER, HOWARD, HOMER;VOGELPOHL, DAVID, RALPH
分类号	H04M1/00;H04M19/04;(IPC1-7):H04M1/00	主分类号	H04M1/00
代理机构		代理人
主权项
地址

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