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经营范围
发明名称
Ear plug
摘要
A sound-reducing ear plug formed of a soft plastic and adapted to fit into ear canals of different sizes.
申请公布号
US4094315(A)
申请公布日期
1978.06.13
申请号
US19760736885
申请日期
1976.10.29
申请人
LEIGHT, CHARLES
发明人
LEIGHT, CHARLES
分类号
A61F11/08;(IPC1-7):A61F11/02
主分类号
A61F11/08
代理机构
代理人
主权项
地址
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