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发明名称
Device for selectively exposing and concealing stimuli
摘要
申请公布号
US3225457(A)
申请公布日期
1965.12.28
申请号
US19630287273
申请日期
1963.06.12
申请人
ALEXANDER SCHURE
发明人
SCHURE ALEXANDER
分类号
G09B3/08
主分类号
G09B3/08
代理机构
代理人
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