Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7884888 | Automatic darkening filter with offset polarizers | Kristina M. Magnusson, Kenneth Jarefors | 2011-02-08 |
| 7477330 | Automatic darkening filter with offset polarizers | Kristina M. Magnusson, Kenneth Jarefors | 2009-01-13 |
| 4637731 | Device for making porous concrete | — | 1987-01-20 |