Issued Patents 2021
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11027231 | Air filter with visual filter life indicator zone and sorbent-loaded visual reference zone | Liang Cheng, Andrew R. Fox, Zhiqun Zhang | 2021-06-08 |
| 10960341 | Air filters comprising polymeric sorbents for aldehydes | Michael S. Wendland, Michael W. Kobe, Andrew R. Fox | 2021-03-30 |