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发明名称
Digital Controlled Ringer Signal Generation
摘要
申请公布号
CA2134787(A1)
申请公布日期
1992.12.13
申请号
CA19912134787
申请日期
1991.06.12
申请人
MITEL CORP
发明人
OPREA DAN R F
分类号
G08B3/10;H04M19/04;(IPC1-7):H04M3/02
主分类号
G08B3/10
代理机构
代理人
主权项
地址
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