Cassette type stereo speaker system
US4764961A · kind A · utility
59Cited by
3References
1Claims
0Family size
Inventor
Key dates
| Filing date | Nov 6, 1986 |
| Grant date | Aug 16, 1988 |
| Priority date | — |
| Expiry date | Nov 6, 2006 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R5/02
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A cassette type stereo speaker system comprises a body case, a screen, a vibrating sheet, a voice coil, a magnetic path system and a plug. The magnetic path system includes a yoke iron, a center magnet, and a ferrite magnet. The vibrating sheet is a very thin sheet to be mounted over the voice coil. The whole speaker system has the features of being simple in structure, and being convenient to a user to carry or to store it.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.