Portable computer expansion base with enhancement speaker
US6359994B1 · kind B1 · utility
46Cited by
17References
28Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 28, 1998 |
| Grant date | Mar 19, 2002 |
| Priority date | — |
| Expiry date | May 28, 2018 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R2205/021
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
An expansion base with a rearward-emitting expansion speaker for emitting low frequency audio and providing surround sound capability. The frequency response of the expansion speaker includes subwoofer frequencies, and is also extended to 600 Hz or higher, to enhance surround sound and spatial impression effects.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.