Navigation system including a drive for reading out navigation data and a method for operating a navigation system
US7756628B2 · kind B2 · utility
0Cited by
8References
10Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jan 7, 2005 |
| Grant date | Jul 13, 2010 |
| Priority date | — |
| Expiry date | Jul 18, 2027 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B2220/2545
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A navigation system including a drive for reading out navigation data which is stored on a data medium. In addition to the navigation data, a pregap is present on the data medium in which identification data is stored. The drive is designed in such a way that it is able to read CD information in the pregap and compares the identification data stored in the pregap to predefined data to allow or deny access to the navigation data.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.