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发明名称
Improved telephone earpiece coupler
摘要
申请公布号
GB9721923(D0)
申请公布日期
1997.12.17
申请号
GB19970021923
申请日期
1997.10.17
申请人
HARWOOD, HUGH D
发明人
分类号
主分类号
代理机构
代理人
主权项
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