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发明名称
Key telephone system
摘要
申请公布号
GB2239580(B)
申请公布日期
1994.08.31
申请号
GB19900025262
申请日期
1990.11.20
申请人
* MATSUSHITA ELECTRIC INDUSTRIAL CO LTD
发明人
YOSHIO * NOMURA
分类号
H04Q3/58;H04M3/20;H04M3/56;H04M9/00;(IPC1-7):H04M3/56
主分类号
H04Q3/58
代理机构
代理人
主权项
地址
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