Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7383051 | Estimating the location of a mobile unit based on the elimination of improbable locations | David Stevenson Spain, Jr., Robert Lewis Martin | 2008-06-03 |
| 6944465 | Estimating the location of a mobile unit based on the elimination of improbable locations | David Stevenson Spain, Jr., Robert Lewis Martin | 2005-09-13 |
| 6782265 | Location determination using RF fingerprinting | Chee-Yee Chong, Robert Morris Dressler, Padmanabha R. Rao, Paolo Siccardo, David Stevenson Spain, Jr. | 2004-08-24 |
| 6393294 | Location determination using RF fingerprinting | Chee-Yee Chong, Robert Morris Dressler, Padmanabha R. Rao, Paolo Siccardo, David Stevenson Spain, Jr. | 2002-05-21 |