Issued Patents All Time
Showing 1–25 of 35 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10859709 | Satellite navigation receiver with fixed point sigma rho filter | Wei Yu, Richard G. Keegan | 2020-12-08 |
| 10048385 | Satellite navigation receiver with fixed point sigma RHO filter | Wei Yu, Richard G. Keegan | 2018-08-14 |
| 9036682 | Phase multi-path mitigation | Richard G. Keegan | 2015-05-19 |
| 8659474 | Navigation system and method for resolving integer ambiguities using double difference ambiguity constraints | Liwen L. Dai, Yujie Zhang, Min Wang | 2014-02-25 |
| 8416133 | System and method for compensating for faulty measurements | Liwen L. Dai | 2013-04-09 |
| 8242953 | Distance dependent error mitigation in real-time kinematic (RTK) positioning | Liwen L. Dai, Daniel J. Eslinger, Richard Sharpe | 2012-08-14 |
| 8035552 | Distance dependant error mitigation in real-time kinematic (RTK) positioning | Liwen L. Dai, Daniel J. Eslinger, Richard Sharpe | 2011-10-11 |
| 7961143 | Partial search carrier-phase integer ambiguity resolution | Liwen L. Dai, Daniel J. Eslinger, Richard Sharpe | 2011-06-14 |
| 7679555 | Navigation receiver and method for combined use of a standard RTK system and a global carrier-phase differential positioning system | Liwen L. Dai, Chaochao Wang, Daniel J. Eslinger, Richard Sharpe | 2010-03-16 |
| 7633437 | Method for using three GPS frequencies to resolve whole-cycle carrier-phase ambiguities | — | 2009-12-15 |
| 7511661 | Method for combined use of a local positioning system, a local RTK system, and a regional, wide-area, or global carrier-phase positioning system | Scott Stephens | 2009-03-31 |
| 7427950 | Method for increasing the reliability of position information when transitioning from a regional, wide-area, or global carrier-phase differential navigation (WADGPS) to a local real-time kinematic (RTK) navigation system | Daniel J. Eslinger, Jing Sun, Richard Sharpe, Frederick W. Nelson, Terence D. Pickett | 2008-09-23 |
| 7248211 | Moving reference receiver for RTK navigation | Richard Sharpe | 2007-07-24 |
| 7212155 | GPS navigation using successive differences of carrier-phase measurements | Richard Sharpe, Yunchun Yang | 2007-05-01 |
| 7119741 | Method for combined use of a local RTK system and a regional, wide-area, or global carrier-phase positioning system | Richard Sharpe, Frederick W. Nelson, Terence D. Pickett, Yunchun Yang | 2006-10-10 |
| 7117417 | Method for generating clock corrections for a wide-area or global differential GPS system | Richard Sharpe, Frederick W. Nelson | 2006-10-03 |
| 7071870 | Method for combined use of local positioning system and a global positioning system | Richard Sharpe, Frederick W. Nelson, Terence D. Pickett, Yunchun Yang | 2006-07-04 |
| 6934632 | Method for using three GPS frequencies to resolve carrier-phase integer ambiguities | — | 2005-08-23 |
| 6864836 | Method for receiver autonomous integrity monitoring and fault detection and elimination | Richard Sharpe, Yunchun Yang | 2005-03-08 |
| 6753810 | Fast ambiguity resolution for real time kinematic survey and navigation | Yunchun Yang, Richard Sharpe | 2004-06-22 |
| 6603803 | Global positioning system receiver for monitoring the satellite transmissions and for reducing the effects of multipath error on coded signals and carrier phase measurements | — | 2003-08-05 |
| 6347113 | Global positioning system receiver for monitoring the satellite transmissions and for reducing the effects of multipath error | — | 2002-02-12 |
| 6163567 | Method and apparatus for code synchronization in a global positioning system receiver | — | 2000-12-19 |
| 6023489 | Method and apparatus for code synchronization in a global positioning system receiver | — | 2000-02-08 |
| 6014610 | Navigation system and method | Kevin Judge | 2000-01-11 |