Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6639977 | System and method for reverse billing of a telephone call | Donald B. Vaello | 2003-10-28 |
| 6636591 | System and method for affecting inmate conduct with good behavior discount telephone rates | Donald B. Vaello | 2003-10-21 |