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发明名称
ELECTRONIC BLACKBOARD APPARATUS
摘要
申请公布号
JPH02307796(A)
申请公布日期
1990.12.20
申请号
JP19890128989
申请日期
1989.05.24
申请人
NEC CORP
发明人
NAKANO MASAKO
分类号
B43L1/04;G09G3/00
主分类号
B43L1/04
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