Issued Patents 2005
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6876858 | Methods of and system for portable cellular phone voice communication and positional location data communication using the cellular phone network control channel | William Duvall | 2005-04-05 |
| 6847825 | Method and system for portable cellular phone voice communication and positional location data communication | William Duvall | 2005-01-25 |