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发明名称
TELEPHONE RINGING CIRCUIT
摘要
申请公布号
GB2209907(B)
申请公布日期
1991.05.29
申请号
GB19880018487
申请日期
1988.08.03
申请人
* GEC PLESSEY TELECOMMUNICATIONS LIMITED
发明人
PETER DAVID * HARGREAVES;ANTHONY JAMES * CHATTERTON
分类号
H04M19/02
主分类号
H04M19/02
代理机构
代理人
主权项
地址
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