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发明名称
Display apparatus
摘要
申请公布号
US2611201(A)
申请公布日期
1952.09.23
申请号
US19490130813
申请日期
1949.12.02
申请人
BELLIS EDWARD W
发明人
BELLIS EDWARD W.
分类号
G09B29/02
主分类号
G09B29/02
代理机构
代理人
主权项
地址
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