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经营范围
发明名称
Improvements relating to photographic plate and film holders
摘要
申请公布号
GB711408(A)
申请公布日期
1954.06.30
申请号
GB19520009839
申请日期
1952.04.18
申请人
NIKOLAUS KARPF
发明人
分类号
G03B17/26
主分类号
G03B17/26
代理机构
代理人
主权项
地址
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