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发明名称
ELECTRONIC BLACKBOARD
摘要
申请公布号
JPH0233252(A)
申请公布日期
1990.02.02
申请号
JP19880184383
申请日期
1988.07.22
申请人
MATSUSHITA GRAPHIC COMMUN SYST INC
发明人
SUEMATSU SHIGERU
分类号
B43L1/04;H04N1/00
主分类号
B43L1/04
代理机构
代理人
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