Issued Patents 2002
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6418307 | Method and system for delivering a voice mail notification to a subscriber using cellular phone network | — | 2002-07-09 |
| 6411807 | Roaming authorization system | Michael Redden | 2002-06-25 |
| 6373931 | Method for allowing a called party to allocate call payment responsibility | Michael Buhrmann | 2002-04-16 |