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发明名称
ELECTRONIC BLACKBOARD
摘要
申请公布号
JPS62130898(A)
申请公布日期
1987.06.13
申请号
JP19850271172
申请日期
1985.12.02
申请人
RICOH CO LTD
发明人
OKI YASUHIRO
分类号
B43L1/04
主分类号
B43L1/04
代理机构
代理人
主权项
地址
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