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发明名称
Earplug
摘要
申请公布号
US2538339(A)
申请公布日期
1951.01.16
申请号
US19490115827
申请日期
1949.09.15
申请人
THOMAS MARY J
发明人
THOMAS MARY J.
分类号
A61F11/08
主分类号
A61F11/08
代理机构
代理人
主权项
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