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发明名称
PABX WITH TELETEXT FACILITY
摘要
申请公布号
GB2212697(A)
申请公布日期
1989.07.26
申请号
GB19870026858
申请日期
1987.11.17
申请人
* THE PLESSEY COMPANY PLC
发明人
NIGEL * CHAMBERLAIN
分类号
H04Q3/545;H04M3/42;H04M11/08;H04Q3/58;H04Q3/62
主分类号
H04Q3/545
代理机构
代理人
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地址
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