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发明名称
CLEANING BLACKBOARD
摘要
申请公布号
JPH11123119(A)
申请公布日期
1999.05.11
申请号
JP19980210069
申请日期
1998.07.24
申请人
JANG CHANG-HO
发明人
JANG CHANG-HO
分类号
A47B97/04;B43L1/04;B43L21/00;(IPC1-7):A47B97/04
主分类号
A47B97/04
代理机构
代理人
主权项
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