Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5003584 | Method and apparatus for the billing of value-added communication calls | Irving Benyacar, Elizabeth V. Courte, Albert Friedes, David D. Kaufman, James R. Magura +4 more | 1991-03-26 |