Navigation system equipped with portable sub-navigation unit
US6748321B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 16, 2002 |
| Grant date | Jun 8, 2004 |
| Priority date | — |
| Expiry date | Dec 14, 2022 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01C21/3423
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A navigation system comprises a navigation apparatus mounted on a vehicle and a portable information device communicable with the navigation apparatus based on a predetermined communication protocol. The navigation apparatus searches a route from a current position to a destination, and guides the searched route to the vehicle, that is, crews on board. The navigation apparatus further comprises a unit for searching a further route from a further current position to the destination in response to a predetermined command. The further current position is a position at which the unit searches the further route. The navigation apparatus further comprises a transfer unit for transferring information indicative of the further route to the portable information device. This device provides a person, who carries the device, with a further route guide by showing the further route, after the route guide performed by the navigation apparatus.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.