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发明名称
PHOTOGRAPHIC ELEMENT
摘要
申请公布号
CA460443(A)
申请公布日期
1949.10.18
申请号
CAD460443
申请日期
申请人
E.I. DU PONT DE NEMOURS AND COMPANY
发明人
FRANCIS PETER ALLES
分类号
主分类号
代理机构
代理人
主权项
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