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经营范围
发明名称
KEY TELEPHONE SYSTEM
摘要
申请公布号
JPH0556169(A)
申请公布日期
1993.03.05
申请号
JP19910215750
申请日期
1991.08.28
申请人
NEC CORP
发明人
NAGATANI MAMORU
分类号
H04M3/42;H04M3/44;H04Q3/58
主分类号
H04M3/42
代理机构
代理人
主权项
地址
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