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发明名称
Changeable advertising device
摘要
申请公布号
US1765260(A)
申请公布日期
1930.06.17
申请号
US19290363013
申请日期
1929.05.14
申请人
CHINSKI CHARLES C
发明人
CHINSKI CHARLES C.
分类号
G09F7/22
主分类号
G09F7/22
代理机构
代理人
主权项
地址
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