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经营范围
发明名称
EXTENSION TELEPHONE EXCHANGE DEVICE
摘要
申请公布号
JPH0637926(A)
申请公布日期
1994.02.10
申请号
JP19920190985
申请日期
1992.07.17
申请人
NEC CORP
发明人
HASHIMOTO JUNICHI
分类号
H04M11/00;H04N1/00;H04Q3/58;(IPC1-7):H04M11/00
主分类号
H04M11/00
代理机构
代理人
主权项
地址
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