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经营范围
发明名称
ELECTRONIC BLACKBOARD DEVICE
摘要
申请公布号
JPH0865433(A)
申请公布日期
1996.03.08
申请号
JP19940196499
申请日期
1994.08.22
申请人
RICOH CO LTD
发明人
HIRONO TATSUO
分类号
B43L1/04;G03G15/22;G06T1/00;G06T11/80;H04N1/00;(IPC1-7):H04N1/00
主分类号
B43L1/04
代理机构
代理人
主权项
地址
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