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发明名称
OVERHEAD PROJECTOR
摘要
申请公布号
JPH0415633(A)
申请公布日期
1992.01.21
申请号
JP19900120901
申请日期
1990.05.09
申请人
RICOH CO LTD
发明人
TAGIWA IZUMI;SHIMIZU KENICHI
分类号
G03B21/132;G03B21/14
主分类号
G03B21/132
代理机构
代理人
主权项
地址
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