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经营范围
发明名称
Teleprinter exchange
摘要
Teleprinter exchange dialling signal correction circuit has four timers, a flip-flop and gates.
申请公布号
CH589397(A5)
申请公布日期
1977.06.30
申请号
CH19730013601
申请日期
1973.09.24
申请人
SIEMENS AG
发明人
分类号
H04L25/03;H04L12/02;H04L25/64;H04Q1/36;(IPC1-7):H04Q1/36;H04L11/02
主分类号
H04L25/03
代理机构
代理人
主权项
地址
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