发明名称 |
Earplug |
摘要 |
The present invention relates to an earplug with a through duct, in which a membrane element is adapted and comprises a membrane holder and a membrane held thereby which is adapted to lock the membrane element. The invention also relates to a method of making such an earplug and a method of affecting the course of the attenuation curve of an earplug.
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申请公布号 |
US2003159878(A1) |
申请公布日期 |
2003.08.28 |
申请号 |
US20030239158 |
申请日期 |
2003.04.14 |
申请人 |
HAKANSSON JORGEN;HISELIUS PER;PERSSON MARIE |
发明人 |
HAKANSSON JORGEN;HISELIUS PER;PERSSON MARIE |
分类号 |
A61F11/08;H04R25/00;(IPC1-7):A61B7/02;H04R25/02 |
主分类号 |
A61F11/08 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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