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发明名称
Display apparatus
摘要
申请公布号
US2197057(A)
申请公布日期
1940.04.16
申请号
US19390265741
申请日期
1939.04.03
申请人
PERKINS MACHINE AND GEAR COMPANY
发明人
OAKLEY JOHN
分类号
G09F11/23
主分类号
G09F11/23
代理机构
代理人
主权项
地址
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