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发明名称
PHOTOGRAPHIC ARTICLE
摘要
申请公布号
CA460720(A)
申请公布日期
1949.11.01
申请号
CAD460720
申请日期
申请人
E.I. DU PONT DE NEMOURS AND COMPANY
发明人
OSWALD ARTHUR NEBEL
分类号
主分类号
代理机构
代理人
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