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经营范围
发明名称
Improvements in or relating to illumination devices for photographic purposes, and electric switches therefor
摘要
申请公布号
GB517120(A)
申请公布日期
1940.01.22
申请号
GB19380021213
申请日期
1938.07.18
申请人
JOHN LOMAX
发明人
分类号
G03B7/16
主分类号
G03B7/16
代理机构
代理人
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