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发明名称
COMMUNICATIONS HEADSET
摘要
申请公布号
GB8412899(D0)
申请公布日期
1984.06.27
申请号
GB19840012899
申请日期
1984.05.21
申请人
NORTHERN TELECOM LTD
发明人
分类号
H04M1/05;(IPC1-7):H04R1/00
主分类号
H04M1/05
代理机构
代理人
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