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发明名称
Display apparatus
摘要
申请公布号
US1807986(A)
申请公布日期
1931.06.02
申请号
US19300456537
申请日期
1930.05.28
申请人
HOFSCHNEIDER FREDERIC J
发明人
HOFSCHNEIDER FREDERIC J.
分类号
A47F7/00
主分类号
A47F7/00
代理机构
代理人
主权项
地址
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