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