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发明名称
VERFAHREN FÜR EIN SICHERES INTERFACE ZWISCHEN TELEFON MIT KARTE UND DEM NETZ IN EINEM FERNSPRECHSYSTEM
摘要
申请公布号
DE59610820(D1)
申请公布日期
2003.12.18
申请号
DE19965010820
申请日期
1996.09.03
申请人
SIEMENS AG
发明人
RAAF, BERNHARD
分类号
H04L9/32;H04M1/66;H04M3/38;H04Q7/38;(IPC1-7):H04M3/38
主分类号
H04L9/32
代理机构
代理人
主权项
地址
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