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经营范围
发明名称
TELEPHONE EXCHANGE SYSTEM
摘要
申请公布号
JPH02312347(A)
申请公布日期
1990.12.27
申请号
JP19890133828
申请日期
1989.05.26
申请人
NEC CORP
发明人
YAMAZAKI YASUO
分类号
H04M1/00;H04M1/274;H04M1/56
主分类号
H04M1/00
代理机构
代理人
主权项
地址
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