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发明名称
PROCESS FOR FEEDING AUDIBLE TONES INTO CONFERENCE COMMUNICATIONS
摘要
申请公布号
EP0033933(B1)
申请公布日期
1984.05.02
申请号
EP19810100733
申请日期
1981.02.02
申请人
SIEMENS AKTIENGESELLSCHAFT
发明人
ZEITRAG, ROLF, DIPL.-PHYS.
分类号
H04M3/56;H04M19/02;H04Q1/457;H04Q11/04;(IPC1-7):H04M3/56;H04Q1/45
主分类号
H04M3/56
代理机构
代理人
主权项
地址
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