Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5534932 | Letterbox television system | Franciscus W. P. Vreeswijk, Theodora L. Hamann | 1996-07-09 |
| 5432557 | Extended television signal receiver | Theodora L. Hamann, Wilhelmus A. Van de Goor, Leendert Rosendaal, Franciscus W. P. Vreeswijk, Johannes Yzebrand Tichelaar +1 more | 1995-07-11 |
| 5432562 | Television signal reception | Johannes I. J. Tichelaar, Wouter Venis | 1995-07-11 |