Van 'T Hof; Pieter Gerard
Patent Applications and Registrations
Patent applications and USPTO patent grants for Van 'T Hof; Pieter Gerard.The latest application filed is for "acoustic filter with enhanced valve stroke".
- Van 'T Hof; Pieter Gerard - Rotterdam NL
- Van 'T Hof; Pieter Gerard - Delft NL
| Patent | Date |
|---|---|
| Acoustic filter with enhanced valve stroke Grant 11,438,709 - Lara-Quintanilla , et al. September 6, 2 | 2022-09-06 |
| Earplug and method for attenuating sound Grant 11,291,586 - Van 'T Hof , et al. April 5, 2 | 2022-04-05 |
| Acoustic valve and ear plug for hearing protection Grant 11,273,076 - van't Hof , et al. March 15, 2 | 2022-03-15 |
| Acoustic filter with attenuation control Grant 11,266,532 - Van 'T Hof , et al. March 8, 2 | 2022-03-08 |
| Acoustic Filter With Enhanced Valve Stroke App 20210409874 - LARA-QUINTANILLA; Adrian ; et al. | 2021-12-30 |
| Acoustic Filter With Attenuation Control App 20200352788 - VAN 'T HOF; Pieter Gerard ; et al. | 2020-11-12 |
| Earplug And Method For Attenuating Sound App 20190321230 - VAN 'T HOF; Pieter Gerard ; et al. | 2019-10-24 |
| Acoustic Filter And Method Of Manufacturing App 20180277087 - VAN 'T HOF; Pieter Gerard ; et al. | 2018-09-27 |
| Method and system for testing a mould shape quality of a user-customized ear mould Grant 9,930,454 - van't Hof , et al. March 27, 2 | 2018-03-27 |
| Acoustic Valve And Ear Plug For Hearing Protection App 20170202710 - van 't Hof; Pieter Gerard ; et al. | 2017-07-20 |
| Method And System For Testing A Mould Shape Quality Of A User-customized Ear Mould App 20160241967 - van 't Hof; Pieter Gerard ; et al. | 2016-08-18 |
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