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经营范围
发明名称
a safety device of an earphone.
摘要
申请公布号
KR20120000889(U)
申请公布日期
2012.02.06
申请号
KR20110000937U
申请日期
2011.01.31
申请人
发明人
分类号
H04R1/10
主分类号
H04R1/10
代理机构
代理人
主权项
地址
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