Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4830138 | Pressure ring for ear cover | Leif Palmaer | 1989-05-16 |
| D298670 | Hearing protector | — | 1988-11-22 |
| 4556121 | Holder | Leif Palmaer, Bjorn Jacobsson | 1985-12-03 |
| 4293960 | Headgear | — | 1981-10-13 |
| 4238132 | Connector | — | 1980-12-09 |
| 4224694 | Accessory support member for a helmet | — | 1980-09-30 |
| 4186523 | Skylight operating means | — | 1980-02-05 |
| 4186447 | Ear protector attachment for a helmet | — | 1980-02-05 |