Earphone device
US9020181B2 · kind B2 · utility
9Cited by
17References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 10, 2013 |
| Grant date | Apr 28, 2015 |
| Priority date | — |
| Expiry date | Jun 10, 2033 |
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.