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经营范围
发明名称
KEY TELEPHONE SYSTEM
摘要
申请公布号
JPH03117154(A)
申请公布日期
1991.05.17
申请号
JP19890254132
申请日期
1989.09.29
申请人
NEC CORP
发明人
NAKAHARA TATSU
分类号
H04M3/42;H04M1/27;H04M3/533;H04Q3/58
主分类号
H04M3/42
代理机构
代理人
主权项
地址
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