Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6181691 | Control of a telephone switching system over a digital information network | Frank Markgraf, Clemens Wittinger | 2001-01-30 |
| 5920841 | Speech supported navigation of a pointer in a graphical user interface | Viktor Schwab | 1999-07-06 |