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经营范围
发明名称
Improvements in and relating to cinema and like projection screens
摘要
申请公布号
GB543122(A)
申请公布日期
1942.02.11
申请号
GB19400007930
申请日期
1940.05.02
申请人
ERNEST WINDSOR-BOWEN
发明人
分类号
G03B21/60
主分类号
G03B21/60
代理机构
代理人
主权项
地址
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