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经营范围
发明名称
Improvements in or relating to screens for use in connection with cinematograph projection
摘要
申请公布号
GB499923(A)
申请公布日期
1939.01.31
申请号
GB19380007988
申请日期
1938.03.15
申请人
EDWARD GEORGE TURNER
发明人
分类号
G03B21/56
主分类号
G03B21/56
代理机构
代理人
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