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发明名称
Improvements relating to display devices
摘要
申请公布号
GB331262(A)
申请公布日期
1930.06.30
申请号
GB19290003018
申请日期
1929.01.29
申请人
TRAVELAD CORPORATION
发明人
分类号
G09F13/14
主分类号
G09F13/14
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代理人
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