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经营范围
发明名称
Enlargement camera
摘要
申请公布号
US1930431(A)
申请公布日期
1933.10.10
申请号
US19320623037
申请日期
1932.07.18
申请人
ERNST LEITZ OPTISCHE WERKE, G. M. B. H.
发明人
BARNACK OSKAR
分类号
G03B27/32
主分类号
G03B27/32
代理机构
代理人
主权项
地址
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