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发明名称
1:N Ring-type signal protection apparatus
摘要
申请公布号
EP0548648(B1)
申请公布日期
2004.02.11
申请号
EP19920120807
申请日期
1992.12.05
申请人
ALCATEL
发明人
STALICK, VICTOR JOSEPH
分类号
H04L12/437;H04J3/14;H04Q11/04;(IPC1-7):H04L12/42
主分类号
H04L12/437
代理机构
代理人
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地址
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