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经营范围
发明名称
ISDN SUBSCRIBER MONITORING EQUIPMENT
摘要
申请公布号
JPS6481560(A)
申请公布日期
1989.03.27
申请号
JP19870237412
申请日期
1987.09.24
申请人
NEC CORP
发明人
YOSHIDA MAKOTO
分类号
H04M3/22
主分类号
H04M3/22
代理机构
代理人
主权项
地址
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