Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8054220 | Variable measurement rate method for positioning systems | David Tester, Nigel James Tolson, Ian Watson | 2011-11-08 |
| 7894987 | Hot zones trigger method for location-based applications and services | David Tester | 2011-02-22 |
| 7564403 | Always-on satellite positioning receiver | David Tester | 2009-07-21 |
| 7561101 | Last known position reporting for always-on global positioning system receiver | David Tester | 2009-07-14 |
| 7460064 | Variable measurement rate method for positioning systems | David Tester, Nigel James Tolson, Ian Watson | 2008-12-02 |
| 7375682 | Always-on satellite positioning receiver | David Tester | 2008-05-20 |
| 5731783 | Method and apparatus for estimating radar signal polarisation | — | 1998-03-24 |