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经营范围
发明名称
PRIVATE BRANCH EXCHANGE SYSTEM
摘要
申请公布号
JPH04188994(A)
申请公布日期
1992.07.07
申请号
JP19900316961
申请日期
1990.11.21
申请人
NEC ENG LTD
发明人
MACHIDA YUICHI
分类号
H04M3/42;H04M3/533;H04Q3/545;H04Q3/58
主分类号
H04M3/42
代理机构
代理人
主权项
地址
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