Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4527017 | Magnet system for an electroacoustic transducer | Herbert Mimmel | 1985-07-02 |
| 4379952 | Mechanical filter for an electrodynamic transducer | Adrianus J. M. Kaizer | 1983-04-12 |