Issued Patents All Time
Showing 26–28 of 28 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7062058 | Cylindrical microphone having an electret assembly in the end cover | Michael G. M. Steeman, Hendrik Dolleman, Adrianus Maria Lafort, Jan Hijman, Dion Ivo de Roo +2 more | 2006-06-13 |
| 6658134 | Shock improvement for an electroacoustic transducer | Benno Hartog | 2003-12-02 |
| 6078677 | Electroacoustic transducer with improved diaphragm attachment | Henk Dolleman, Onno Geschiere, Engbert Wilmink | 2000-06-20 |