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发明名称
Noise-cancelling handset
摘要
申请公布号
HK112297(A)
申请公布日期
1997.08.29
申请号
HK19970001122
申请日期
1997.06.26
申请人
BRITISH TELECOMMUNICATIONS PUBLIC LIMITED COMPANY
发明人
MICHAEL PETER HOLLIER;KEVIN WELSBY
分类号
H04M1/03;H04M1/19;H04R1/40;(IPC1-7):H04M1/19
主分类号
H04M1/03
代理机构
代理人
主权项
地址
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