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发明名称
ELECTRONIC BLACKBOARD SYSTEM
摘要
申请公布号
JPH1175005(A)
申请公布日期
1999.03.16
申请号
JP19970249964
申请日期
1997.08.29
申请人
RICOH ELEMEX CORP
发明人
ITO TAKAHIRO
分类号
G06F3/02;H04N1/00;(IPC1-7):H04N1/00
主分类号
G06F3/02
代理机构
代理人
主权项
地址
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