Method of and system for rapidly locating all passive underground electronic marker types
US7170411B2 · kind B2 · utility
3Cited by
12References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 11, 2004 |
| Grant date | Jan 30, 2007 |
| Priority date | — |
| Expiry date | Mar 11, 2024 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L27/2649
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A method of and system for rapidly locating all passive underground electronic marker types in an area under survey may locate various marker types simultaneously. In accordance with one aspect of the present invention, a marker locator may sequentially transmit and receive multiple frequencies very quickly; alternatively, the transmitter may transmit a broadband signal on multiple frequencies.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.