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发明名称
METHOD AND DEVICE FOR CONTROLLING EFFECTIVE PERIOD OF ADDITIONAL SERVICE FUNCTION IN EXCHANGE
摘要
申请公布号
JPH09284398(A)
申请公布日期
1997.10.31
申请号
JP19960091473
申请日期
1996.04.12
申请人
NEC CORP
发明人
NAKAMURA TOSHIO
分类号
H04M3/42;(IPC1-7):H04M3/42
主分类号
H04M3/42
代理机构
代理人
主权项
地址
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