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经营范围
发明名称
Improvements in optical projection screens
摘要
申请公布号
GB426397(A)
申请公布日期
1935.04.01
申请号
GB19330024287
申请日期
1933.09.01
申请人
BRITISH CELANESE LIMITED;WILLIAM HENRY MOSS
发明人
分类号
G03B21/62
主分类号
G03B21/62
代理机构
代理人
主权项
地址
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