Speaker
US6305491A · kind A · utility
17Cited by
9References
16Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 7, 1999 |
| Grant date | Oct 23, 2001 |
| Priority date | — |
| Expiry date | May 7, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R2307/207
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A speaker includes a diaphragm, a frame accommodating the diaphragm and an edge attached to an outer periphery of the diaphragm as well as to an inner periphery of the frame so as to retain the diaphragm within an interior of the frame. The edge has a thickness which is smallest at substantially a central portion between the diaphragm and the frame and the vicinity thereof, and increases toward the diaphragm and the frame.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.