| 发明名称 |
Ear stoppers to defend against excess noise are fabricated of oto-plastic incorporating one or more passages each with two or more filters |
| 摘要 |
<p>Ear stoppers to defend against excess noise are fabricated of oto-plastic incorporating one or more passages. The passage or passages each incorporate one or more acoustic filters.</p> |
| 申请公布号 |
DE102004056053(A1) |
申请公布日期 |
2005.07.21 |
| 申请号 |
DE20041056053 |
申请日期 |
2004.11.20 |
| 申请人 |
HEARSAFE TECHNOLOGIES GMBH & CO. KG |
发明人 |
BESTE, ECKHARD |
| 分类号 |
A61F11/08;H04R1/10;H04R5/033;(IPC1-7):H04R5/033 |
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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