Earplug with tip cavity and methods of manufacturing the same
- 专利权人:
- 3M INNOVATIVE PROPERTIES COMPANY
- 发明人:
- Jeffrey L. Hamer,Kenneth F. Teeters,Ravi Thomas
- 申请号：
- US13768214
- 公开号：
- US09549855B2
- 申请日:
- 2013.02.15
- 申请国别(地区):
- US
- 年份:
- 2017
- 代理人:
- 摘要：
- Hearing protection devices, e.g., push-to-fit earplugs, having a tip cavity in the sound attenuating body and methods of manufacturing the hearing protection devices are described herein.
- 来源网站：
- 中国工程科技知识中心
