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发明名称
Display apparatus
摘要
申请公布号
US1969461(A)
申请公布日期
1934.08.07
申请号
US19330659973
申请日期
1933.03.07
申请人
THE WESTERN UNION TELEGRAPH COMPANY
发明人
HEWITT ERNEST W.
分类号
G03B21/134
主分类号
G03B21/134
代理机构
代理人
主权项
地址
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