Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4741040 | Bass-reflex loudspeaker system | — | 1988-04-26 |
| 4709391 | Arrangement for converting an electric signal into an acoustic signal or vice versa and a non-linear network for use in the arrangement | Gerrit H. Van Leeuwen | 1987-11-24 |
| 4649565 | Electro-acoustic converter with compensated frequency response characteristic | Frederik L. J. Sangster, Cornelis A. M. Wesche | 1987-03-10 |
| 4547631 | Large-excursion electroacoustic transducer | Joris A. M. Nieuwendijk, Georgius B. J. Sanders, Cornelis D. Van Dijk | 1985-10-15 |
| 4395588 | MFB system with a by-pass network | Nico V. Franssen, deceased, Friedrich J. de Haan, administrator, Cornelis A. M. Wesche | 1983-07-26 |
| 4379952 | Mechanical filter for an electrodynamic transducer | Wiert Kopinga | 1983-04-12 |