Issued Patents 2004
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6727847 | Using digital television broadcast signals to provide GPS aiding information | Matthew Rabinowitz, James J. Spilker, Jr., Matthew Dalton Pierce | 2004-04-27 |
| 6717547 | Position location using broadcast television signals and mobile telephone signals | James J. Spilker, Jr., Matthew Rabinowitz | 2004-04-06 |