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发明名称
MULTIPURPOSE BULLETIN BOARD
摘要
申请公布号
KR910008934(Y1)
申请公布日期
1991.11.15
申请号
KR19880021103U
申请日期
1988.12.20
申请人
KOREA BLACKBOARD MATERIAL CO.,LTD.
发明人
CHANG CHANG-HO
分类号
G09F7/00;(IPC1-7):G09F7/00
主分类号
G09F7/00
代理机构
代理人
主权项
地址
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