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发明名称
Changeable exhibitor
摘要
申请公布号
US2151333(A)
申请公布日期
1939.03.21
申请号
US19370169781
申请日期
1937.10.19
申请人
INTERNATIONAL MUTOSCOPE REEL CO. INC.
发明人
ROBIN JACOB I.
分类号
G09F23/00
主分类号
G09F23/00
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