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发明名称
BALANCE FOR BALL-PEN
摘要
申请公布号
KR810002646(Y1)
申请公布日期
1981.12.29
申请号
KR19810001815U
申请日期
1981.03.14
申请人
AHN BYUNG MOO
发明人
AHN BYUNG MOO
分类号
G09B23/00;(IPC1-7):G09B23/00
主分类号
G09B23/00
代理机构
代理人
主权项
地址
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