| Original language | English |
|---|---|
| Patent number | US8923523 |
| State | Published - 2014 |
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Selective filtering earplugs
- Abdelhafid Bouhraoua (Inventor)
Research output: Patent
Research output: Patent
| Original language | English |
|---|---|
| Patent number | US8923523 |
| State | Published - 2014 |