Issued Patents 2004
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6791974 | Universal internet based telephony system that provides ubiquitous access for subscribers from any terminal device | — | 2004-09-14 |
| 6707811 | Internet telephony for ecommerce | Joseph Siegrist, Amen Zwa | 2004-03-16 |