Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8160576 | LEO-based positioning system for indoor and stand-alone navigation | David A. Whelan, Clark E. Cohen, Barton G. Ferrell | 2012-04-17 |
| 8019541 | Real-time data aiding for enhanced GPS performance | Clark E. Cohen, Bart Ferrell, David A. Whelan | 2011-09-13 |
| 7904243 | Real-time data aiding for enhanced GPS performance | Clark E. Cohen, Bart Ferrell, David A. Whelan | 2011-03-08 |
| 7489926 | LEO-based positioning system for indoor and stand-alone navigation | David A. Whelan, Clark E. Cohen, Barton G. Ferrell | 2009-02-10 |