Prerecorded digital portable personal stereo
US7900009B2 · kind B2 · utility
2Cited by
2References
12Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jul 8, 2008 |
| Grant date | Mar 1, 2011 |
| Priority date | — |
| Expiry date | Mar 26, 2029 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11C2207/16
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
This digital portable personal stereo comprises a housing containing a connection interface for connection to earphones; a digital memory immovably attached to the housing; an electronic circuit for accessing said memory; and a control interface for controlling said electronic circuit wherein that a encrypted audio content is prerecorded in the digital memory, and in that the portable personal stereo is adapted to prevent any other audio content from being written in the digital memory.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.