Location acquisition and time adjusting system
US5068838A · kind A · utility
26Cited by
4References
42Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 18, 1990 |
| Grant date | Nov 26, 1991 |
| Priority date | — |
| Expiry date | Jul 18, 2010 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG04R20/00
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An information retrieval system and method for determining the location of a traveller based upon a comparison between broadcast radiowave frequencies at the location and a table of locations for radio stations which broadcast at those radiowave frequencies. By determining the location, the offset hour for the time zone where the radio station is located may be obtained for correcting displaying the hour on an electronic watch. The location, such as a city, is also displayed so that the traveller is apprised of both the correct time and present location automatically.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.