Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5550909 | International toll-free calling process | Rajat Chanda, Steven T. Heinsius | 1996-08-27 |
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5550909 | International toll-free calling process | Rajat Chanda, Steven T. Heinsius | 1996-08-27 |