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经营范围
发明名称
ELECTRONIC BLACKBOARD
摘要
申请公布号
JPS61130099(A)
申请公布日期
1986.06.17
申请号
JP19840252394
申请日期
1984.11.29
申请人
RICOH CO LTD
发明人
YAMAZAKI SHUICHI
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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