Earplug with tip cavity and methods of manufacturing the same
US9549855B2 · kind B2 · utility
9Cited by
33References
24Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 15, 2013 |
| Grant date | Jan 24, 2017 |
| Priority date | — |
| Expiry date | Aug 3, 2033 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29L2031/768
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.