Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6965764 | Method and apparatus for generating billing data in a telecommunication system | Shelaine Green, David Roat, Michael Ferguson, Brian M. Carr | 2005-11-15 |
| 6532282 | Method and system for accumulating call prepayment | Mark Wren | 2003-03-11 |
| 6173171 | Method and apparatus for generating billing data in a telecommunication system | Shelaine Green, David Roat, Michael Ferguson, Brian M. Carr | 2001-01-09 |