Low cost hearing protection device
US6970571B2 · kind B2 · utility
18Cited by
10References
1Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 3, 2003 |
| Grant date | Nov 29, 2005 |
| Priority date | — |
| Expiry date | Mar 21, 2023 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R5/033
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An earmuff comprising a headpiece and a circuit. The headpiece supports the earmuff on the head of an individual. The circuit has an input device for receiving external sound energy and converting the external sound energy to electrical sound signals.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.