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发明名称
ELECTRONIC BLACKBOARD
摘要
申请公布号
JPS6230099(A)
申请公布日期
1987.02.09
申请号
JP19850169462
申请日期
1985.07.31
申请人
RICOH CO LTD
发明人
KIKUI SHINSUKE;SAWAYAMA NOBORU;MIZUMA KENICHI
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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