Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5361297 | Method and apparatus for providing answer supervision and an autonomous pay telephone incorporating the same | Luis R. Ortiz, Alexis Torres | 1994-11-01 |
| 5134651 | Method and apparatus for providing answer supervision and an autonomous pay telephone incorporating the same | Luis R. Ortiz, Alexis Torres | 1992-07-28 |