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发明名称
Portable Speakers
摘要
학교 종소리가 너무 시끄러운데 그것을 휴대용으로 바꾸면 소리도 작게나고 공부에 집중도된다
申请公布号
KR20170000001(U)
申请公布日期
2017.01.02
申请号
KR20150004146U
申请日期
2015.06.23
申请人
김경호
发明人
김경호
分类号
H04R1/02
主分类号
H04R1/02
代理机构
代理人
主权项
地址
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