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发明名称
Signaltonerkennungsverfahren und -Apparat zum Erkennen zumindest eines Tones in einem Dualton-Multifrequenzsignal
摘要
申请公布号
DE69328356(D1)
申请公布日期
2000.05.18
申请号
DE19936028356
申请日期
1993.04.29
申请人
INTERNATIONAL BUSINESS MACHINES CORP., ARMONK
发明人
CESARO, CLAUDE;RICHTER, GERARD
分类号
H04Q1/45;H04Q1/457;(IPC1-7):H04Q1/457
主分类号
H04Q1/45
代理机构
代理人
主权项
地址
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