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发明名称
Motion picture screen
摘要
申请公布号
US2047290(A)
申请公布日期
1936.07.14
申请号
US19330659273
申请日期
1933.03.02
申请人
RADIO CORPORATION
发明人
RINGEL ABRAHAM S.
分类号
G03B21/56
主分类号
G03B21/56
代理机构
代理人
主权项
地址
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