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Advertising or like sign or device
摘要
申请公布号
US1782721(A)
申请公布日期
1930.11.25
申请号
US19280320484
申请日期
1928.11.19
申请人
GENNADY FRENKEL
发明人
FRENKEL GENNADY
分类号
G09F13/14
主分类号
G09F13/14
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代理人
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