Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8044859 | Reference beacon methods and apparatus for TDOA/FDOA geolocation | Henry E. Halladay, David O. Edewaard | 2011-10-25 |
| 7570212 | Reference beacon methods and apparatus for TDOA/FDOA geolocation | Henry E. Halladay, David O. Edewaard | 2009-08-04 |
| 7411548 | Reference beacon identification using transmission sequence characteristics | — | 2008-08-12 |