Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6198810 | Authentication system for a communication network | Renate Zygan-Maus | 2001-03-06 |
| 6154146 | Method of rendering misuse of communication services more difficult | Renate Zygan-Maus | 2000-11-28 |