Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8548152 | System and method for handling toll free number telephone calls | Jeffrey Leister, John Zeigler | 2013-10-01 |
| 8355494 | System and method for handling toll free number telephone calls | Jeffrey Leister, John Zeigler | 2013-01-15 |