Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6763098 | Call blocking based on call properties | Curtis E. Allen, Phillip D. Crable | 2004-07-13 |
| 6522734 | Transaction billing for special service telephone numbers | Curtis E. Allen, Phillip D. Crable, Shannon S. Smith | 2003-02-18 |