Issued Patents All Time
Showing 1–14 of 14 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12150901 | Darkening filter comprising a non-uniform pattern of switchable shutters | Claire R. Donoghue, Britton G. Billingsley | 2024-11-26 |
| 11413190 | Protective headgear comprising a curved switchable shutter and comprising multiple antireflective layers | Kenneth Jarefors, Britton G. Billingsley | 2022-08-16 |
| 11324633 | Welding helmet having a filter arrangement | Kenneth Jarefors | 2022-05-10 |
| 11160687 | Vision-protective headgear with automatic darkening filter comprising an array of switchable shutters | Britton G. Billingsley, Kenneth Jarefors | 2021-11-02 |
| 11129748 | Curved eye protection shield for welding protection | Kenneth Jarefors, Laurent Froissard, Britton G. Billingsley | 2021-09-28 |
| 10866442 | Curved, arcuately-bonded liquid crystal cell and method of making | Louise L. M. Madsen, Larissa Zuravskaja, Kenneth Jarefors | 2020-12-15 |
| 10821026 | Welding protector with magnifying cover | Britton G. Billinglsey, Christopher M. Brown, Timothy L. Wong, Kenneth Jarefors, John M. Kruse +2 more | 2020-11-03 |
| 10758420 | Protective headgear comprising a curved switchable shutter and comprising multiple antireflective layers | Kenneth Jarefors, Britton G. Billingsley | 2020-09-01 |
| 10667952 | Welding helmet having a filter arrangement | Kenneth Jarefors | 2020-06-02 |
| 10426667 | Automatic darkening filter apparatus and method | Kenneth Jarefors | 2019-10-01 |
| 10114242 | Curved automatic-darkening filter | Britton G. Billingsley, Kenneth Jarefors, Larissa Zuravskaja, Joy L. Manske | 2018-10-30 |
| 9254226 | Automatic welding filter with tunable spectral transmission | Kenneth Jarefors | 2016-02-09 |
| 7884888 | Automatic darkening filter with offset polarizers | Kenneth Jarefors, Per-Olav Dahlin | 2011-02-08 |
| 7477330 | Automatic darkening filter with offset polarizers | Kenneth Jarefors, Per-Olav Dahlin | 2009-01-13 |