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经营范围
发明名称
Improvements in or relating to photographic portrait enlargement visualizers
摘要
申请公布号
GB311397(A)
申请公布日期
1930.06.05
申请号
GB19290007228
申请日期
1929.03.05
申请人
PHOTOMATON, INC.
发明人
分类号
G02B27/02
主分类号
G02B27/02
代理机构
代理人
主权项
地址
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