Issued Patents All Time
Showing 1–7 of 7 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10654151 | Welding fixture and welding method using welding fixture | Guangzhao Yang, Tianxiao ZHAO, Ruifeng Yang, Zijian Wang, Libao Cui +3 more | 2020-05-19 |
| 9599721 | Method and system for estimating position with bias compensation | Liwen L. Dai | 2017-03-21 |
| 8803736 | Method and system for estimating position with bias compensation | Liwen L. Dai | 2014-08-12 |
| 8766848 | Method and system for estimating position using dual real time kinematic engines | Liwen L. Dai, Daniel J. Eslinger | 2014-07-01 |
| 8427365 | Method and system for estimating position using dual real time kinematic engines | Liwen L. Dai, Daniel J. Eslinger | 2013-04-23 |
| 7961141 | Methods and systems to increase accuracy in the navigation of single frequency receivers | Liwen L. Dai, Daniel J. Eslinger, John Perry Genta | 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, Daniel J. Eslinger, Ronald R. Hatch, Richard Sharpe | 2010-03-16 |