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发明名称
BLACKBOARD
摘要
申请公布号
JPH09193593(A)
申请公布日期
1997.07.29
申请号
JP19960006373
申请日期
1996.01.18
申请人
NIPPON KEIKOU KK
发明人
TAYAMA KEIKO
分类号
B43L1/04;G09F15/00;(IPC1-7):B43L1/04
主分类号
B43L1/04
代理机构
代理人
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地址
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