Navigation system
US8683606B2 · kind B2 · utility
1Cited by
1References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 7, 2011 |
| Grant date | Mar 25, 2014 |
| Priority date | — |
| Expiry date | Jan 7, 2031 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L63/0428
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
At the first data access by a navigation unit to a recording medium that records updating right information necessary for updating map data in a rewritable data area in which map data are recorded, the updating right information is read from the data area and is deleted from the data area, and a map updating due date created based on the read updating right information is written in a memory of the navigation unit together with the medium identification information read from a non-rewritable management area.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.