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经营范围
发明名称
Exhibiting apparatus
摘要
申请公布号
US2327626(A)
申请公布日期
1943.08.24
申请号
US19390271985
申请日期
1939.05.05
申请人
RADIO CORPORATION OF AMERICA
发明人
EDDY WILLIAM C.
分类号
G09F19/18
主分类号
G09F19/18
代理机构
代理人
主权项
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