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发明名称
Telephony system
摘要
申请公布号
GB2290193(B)
申请公布日期
1999.03.03
申请号
GB19950011318
申请日期
1995.06.05
申请人
* INTERCOM DATA SYSTEMS LIMITED
发明人
DAVID FREDERICK * MACKENZIE;DAVID IAN * SUTTLE
分类号
H04M3/51;H04M3/56;H04M3/58;(IPC1-7):H04M3/50
主分类号
H04M3/51
代理机构
代理人
主权项
地址
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