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发明名称
Durch Elektromotor angetriebene Reklamevorrichtung mit uebereinanderhaengenden Reklametafeln
摘要
申请公布号
DE558794(C)
申请公布日期
1932.09.10
申请号
DED558794D
申请日期
1930.11.23
申请人
HARLOW MASON DAVIS
发明人
分类号
G09F11/34
主分类号
G09F11/34
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代理人
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