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发明名称
BLACKBOARD APPARATUS
摘要
申请公布号
JPH0412897(A)
申请公布日期
1992.01.17
申请号
JP19900115452
申请日期
1990.04.30
申请人
KOKUYO CO LTD;AOI KOKUBAN SEISAKUSHIYO:KK
发明人
NAKAMICHI YOJI;NOGI EIJI
分类号
B43L1/04
主分类号
B43L1/04
代理机构
代理人
主权项
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