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发明名称
PREPARATION OF NEGATIVE IMAGES
摘要
申请公布号
CA674467(A)
申请公布日期
1963.11.19
申请号
CAD674467
申请日期
申请人
E.I. DU PONT DE NEMOURS AND COMPANY
发明人
BERNARD R. HALPERN
分类号
主分类号
代理机构
代理人
主权项
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