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经营范围
发明名称
DRAFTING FILMS
摘要
申请公布号
CA657177(A)
申请公布日期
1963.02.05
申请号
CAD657177
申请日期
申请人
E.I. DU PONT DE NEMOURS AND COMPANY
发明人
ALBERT L. VAN STAPPEN
分类号
主分类号
代理机构
代理人
主权项
地址
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