Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date | Approx Value ⓘ |
|---|---|---|---|---|
| 5640446 | System and method of validating special service calls having different signaling protocols | Gary W. Leopold, George Kult, Lee C. Seydel, Padmanabhan Vijay | 1997-06-17 | $284,256,000 |
| 5638431 | Calling card validation system and method therefor | Gary W. Leopold, George Kult, Lee C. Seydel, Padmanabhan Vijay | 1997-06-10 | $131,957,000 |