Issued Patents 2003
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6559800 | Position location using broadcast analog television signals | James J. Spilker, Jr. | 2003-05-06 |
| 6522297 | Position location using ghost canceling reference television signals | James J. Spilker, Jr. | 2003-02-18 |