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发明名称
Screen holder
摘要
申请公布号
US1742339(A)
申请公布日期
1930.01.07
申请号
US19280272917
申请日期
1928.04.26
申请人
ERNST BORREGARD
发明人
BORREGARD ERNST
分类号
G09F1/12
主分类号
G09F1/12
代理机构
代理人
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