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发明名称
KEY TELEPHONE SYSTEM
摘要
申请公布号
GB8830314(D0)
申请公布日期
1989.02.22
申请号
GB19880030314
申请日期
1988.12.28
申请人
IWATSU ELECTRIC CO LTD
发明人
分类号
H04M9/00;(IPC1-7):H04Q3/58
主分类号
H04M9/00
代理机构
代理人
主权项
地址
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