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经营范围
发明名称
PROJECTION SCREEN
摘要
申请公布号
CA504452(A)
申请公布日期
1954.07.20
申请号
CAD504452
申请日期
申请人
DU MONT TELEVISION AND ELECTRONICS LTD.
发明人
CARL BERKLEY
分类号
主分类号
代理机构
代理人
主权项
地址
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