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发明名称
Advertising demonstrator
摘要
申请公布号
US2118906(A)
申请公布日期
1938.05.31
申请号
US19350019154
申请日期
1935.05.01
申请人
TROXEL HARLEY A
发明人
TROXEL HARLEY A.
分类号
G09B25/02
主分类号
G09B25/02
代理机构
代理人
主权项
地址
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