Issued Patents All Time
Showing 1–13 of 13 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11804205 | Acoustic filter and method of manufacturing | Pieter Gerard Van 'T Hof | 2023-10-31 |
| 11463803 | Acoustic device with deformable shape as valve | Nishant Lawand, Krisztian Kepiro | 2022-10-04 |
| 11438709 | Acoustic filter with enhanced valve stroke | Adrian Lara-Quintanilla, Pieter Gerard Van 'T Hof | 2022-09-06 |
| 11273076 | Acoustic valve and ear plug for hearing protection | Pieter Gerard van't Hof | 2022-03-15 |
| 11266532 | Acoustic filter with attenuation control | Pieter Gerard Van 'T Hof, Adrian Lara-Quintanilla | 2022-03-08 |
| 9930454 | Method and system for testing a mould shape quality of a user-customized ear mould | Pieter Gerard van't Hof | 2018-03-27 |
| 8689931 | Ear protector with a sound damping filter, sound damping filter for such an ear protector as well as method for manufacturing a sound damping filter for such an ear protector | — | 2014-04-08 |
| 8155338 | Earplug for insertion into an auditory duct | — | 2012-04-10 |
| 7783056 | Earplug | — | 2010-08-24 |
| 7706561 | Electroacoustic transducer with a diaphragm and method for fixing a diaphragm in such transducer | Aart Zeger van Halteren, Hendrik Dolleman, Paul Christiaan van Hal | 2010-04-27 |
| 6950529 | System consisting of a microphone and an amplifier | — | 2005-09-27 |
| 6084972 | Integrated microphone/amplifier unit, and amplifier module therefor | Aart Zeger van Halteren | 2000-07-04 |
| 6078677 | Electroacoustic transducer with improved diaphragm attachment | Henk Dolleman, Onno Geschiere, Paul Christiaan van Hal | 2000-06-20 |