Location aware device
US6977587B2 · kind B2 · utility
21Cited by
3References
54Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 9, 2003 |
| Grant date | Dec 20, 2005 |
| Priority date | — |
| Expiry date | Jan 29, 2024 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S13/86
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A device having a signal module configured to transmit a first type of signal and a second type of signal and to receive the first type of signal and the second type of signal. The device also includes a timer and a controller configured to operate the signal module and timer. The controller is operable to determine a location of the device with respect to another device based upon the time elapsed between transmission and receipt of the first type of signal and transmission and receipt of the second type of signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.