Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5781172 | Data input device for use with a data processing apparatus and a data processing apparatus provided with such a device | Frederik L. Engel, Reinder Haakma | 1998-07-14 |
| 5319747 | Data processing system using gesture-based input data | Jacques F. Gerrissen, Johannes R. H. Daamen, Jaap J. De Boer | 1994-06-07 |