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发明名称
Improvements in screen devices adaptable over spectacles and the like
摘要
申请公布号
GB706544(A)
申请公布日期
1954.03.31
申请号
GB19520020290
申请日期
1952.08.12
申请人
GEORGES LISSAC
发明人
分类号
G02C9/04
主分类号
G02C9/04
代理机构
代理人
主权项
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