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发明名称
Phone ringer timer
摘要
申请公布号
GB0211709(D0)
申请公布日期
2002.07.03
申请号
GB20020011709
申请日期
2002.05.22
申请人
WATSON, KEN
发明人
分类号
主分类号
代理机构
代理人
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