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发明名称
ELECTRONIC BLACKBOARD DEVICE
摘要
申请公布号
JPH01306297(A)
申请公布日期
1989.12.11
申请号
JP19880137317
申请日期
1988.06.06
申请人
OKI ELECTRIC IND CO LTD
发明人
SASAKI ATSUSHI
分类号
B43L1/04;H04N1/00
主分类号
B43L1/04
代理机构
代理人
主权项
地址
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