Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8200190 | Call security system | — | 2012-06-12 |
| 7747243 | Call security system | — | 2010-06-29 |
| 6505039 | Call security system which detects fraud by examination of call history | — | 2003-01-07 |
| 6185415 | Call security system | — | 2001-02-06 |
| 5291547 | Call-disposition analyzer | Charles E. Boatwright | 1994-03-01 |
| 4232199 | Special services add-on for dial pulse activated telephone switching office | David PRINCE, William F. Haskett, Helmut Koch | 1980-11-04 |