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经营范围
发明名称
Improvements in optical projection apparatus
摘要
申请公布号
GB397215(A)
申请公布日期
1933.08.24
申请号
GB19320006703
申请日期
1932.03.05
申请人
GERALD HENRY OLIVER
发明人
分类号
G03B21/00
主分类号
G03B21/00
代理机构
代理人
主权项
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