Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6343123 | Method of establishing a toll-free communication connection, as well as a service unit, an exchange and a communications network | Stephan Rupp | 2002-01-29 |
| 6028918 | Telecommunication system, and switching means, and memory means, and method | Stephan Rupp | 2000-02-22 |