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经营范围
发明名称
KEY TELEPHONE SYSTEM
摘要
申请公布号
JPH04150445(A)
申请公布日期
1992.05.22
申请号
JP19900272121
申请日期
1990.10.12
申请人
NEC CORP
发明人
OMICHI MAKOTO
分类号
H04M3/42;H04M1/274;H04M1/2745;H04M1/275;H04M1/64;H04M1/66;H04M1/67;H04Q3/58
主分类号
H04M3/42
代理机构
代理人
主权项
地址
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