Speaker and speaker system
US6804365B2 · kind B2 · utility
2Cited by
6References
8Claims
0Family size
Assignees
Inventors
Key dates
| Filing date | Feb 13, 2002 |
| Grant date | Oct 12, 2004 |
| Priority date | — |
| Expiry date | May 2, 2022 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R2209/027
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A speaker includes a main speaker part, and a case for containing and holding the main speaker part therein. A peripheral portion of a front side of the main speaker part is attached to a peripheral portion of the case, surrounding a hole formed in a front side of the case by placing a gasket cushion between both peripheral portions. The speaker further includes an internal rod, attached to a rear side of the main speaker part, for functioning as an imaginary ground.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.