Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D710821 | Sound amplifier | — | 2014-08-12 |
| D541483 | Hearing protector | Joakim Birgersson, Håkan Davidsson, Anders Roos | 2007-04-24 |
| D541484 | Hearing protector for protective helmets | Joakim Birgersson, Håkan Davidsson, Anders Roos | 2007-04-24 |
| D541485 | Hearing protector part | Joakim Birgersson, Håkan Davidson, Anders Roos | 2007-04-24 |