Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5163032 | Magneto-optical recorder with servo control system for a magnetic-field modulation system | — | 1992-11-10 |
| 4845758 | Equalizer with adjustable band filters and a digital filter suitable for use in the equalizer | Franciscus J. Op de Beek, Johan M. Rijnsburger, Johannes W. Kemna | 1989-07-04 |
| 4628530 | Automatic equalizing system with DFT and FFT | Franciscus J. Op de Beek | 1986-12-09 |
| 4566120 | Loudspeaker system and loudspeaker for use in a loud-speaker system for converting an n-bit digitized electric signal into an acoustic signal | Joris A. M. Nieuwendijk, Franciscus J. Op de Beek, Georgius B. J. Sanders, Wilhelmus D. A. M. van Gijsel | 1986-01-21 |
| 4555797 | Hybrid loudspeaker system for converting digital signals to acoustic signals | Joris A. M. Nieuwendijk, Wilhelmus D. A. M. van Gijsel, Georgius B. J. Sanders | 1985-11-26 |