Frame for speaker device and speaker device
US7325648B2 · kind B2 · utility
4Cited by
36References
6Claims
0Family size
Assignees
Inventors
Key dates
| Filing date | Feb 16, 2006 |
| Grant date | Feb 5, 2008 |
| Priority date | — |
| Expiry date | Jul 22, 2026 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R2499/13
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A frame for a speaker device has an annular outer peripheral portion. The outer peripheral portion includes plural wall portions concentrically formed. An end surface of the wall portion on an inner circumferential side of the outer peripheral portion is formed at a position recessed as compared with an end surface of the wall portion on an outer circumferential side in a direction of a central axis of the outer peripheral portion.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.