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发明名称
Viewing device for photographic apparatus and cinematographic cameras
摘要
申请公布号
US2552940(A)
申请公布日期
1951.05.15
申请号
US19470773576
申请日期
1947.09.12
申请人
PIGNONS S. A. BALLAIGUES
发明人
CORNUT ANDRE-ROBERT
分类号
G03B13/02
主分类号
G03B13/02
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