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发明名称
Sealing means for an aperture in an article comprised of flexible sheet material
摘要
申请公布号
US3058187(A)
申请公布日期
1962.10.16
申请号
US19580779943
申请日期
1958.12.12
申请人
E. I. DU PONT DE NEMOURS AND COMPANY
发明人
GUGEN NORBERT O.
分类号
A41F1/00;B63C11/02
主分类号
A41F1/00
代理机构
代理人
主权项
地址
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