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发明名称
Photographic camera objectives of the schmidt type
摘要
申请公布号
US2515873(A)
申请公布日期
1950.07.18
申请号
US19470766828
申请日期
1947.08.06
申请人
HENRIK HELM CARL
发明人
HELM CARL HENRIK
分类号
G02B17/08
主分类号
G02B17/08
代理机构
代理人
主权项
地址
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