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经营范围
发明名称
Reversible attraction sign
摘要
申请公布号
US1905563(A)
申请公布日期
1933.04.25
申请号
US19320613881
申请日期
1932.05.27
申请人
HATKE CHARLES W
发明人
HATKE CHARLES W.
分类号
G09F7/08
主分类号
G09F7/08
代理机构
代理人
主权项
地址
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