Earphone device
US8611581B2 · kind B2 · utility
25Cited by
13References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 10, 2007 |
| Grant date | Dec 17, 2013 |
| Priority date | — |
| Expiry date | Apr 21, 2030 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R2499/11
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An earphone device includes a housing having a driver unit, and a sound guide tube mounted on a front surface of the housing to protrude from the front surface, in which the sound guide tube is disposed at a position deviated from a center position of the housing.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.