Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4891704 | System for asymmetrical signal transmission | Franciscus T. J. Vonk | 1990-01-02 |
| 4649565 | Electro-acoustic converter with compensated frequency response characteristic | Adrianus J. M. Kaizer, Frederik L. J. Sangster | 1987-03-10 |
| 4395588 | MFB system with a by-pass network | Nico V. Franssen, deceased, Friedrich J. de Haan, administrator, Adrianus J. M. Kaizer | 1983-07-26 |