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发明名称
Display device
摘要
申请公布号
US1777933(A)
申请公布日期
1930.10.07
申请号
US19290373431
申请日期
1929.06.24
申请人
O'BRIEN JOHN J
发明人
O'BRIEN JOHN J.
分类号
G09F7/22;G09F17/00
主分类号
G09F7/22
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