Issued Patents 2021
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11060758 | Air conditioner filter and method of manufacture | Andrew R. Fox | 2021-07-13 |
| 11027231 | Air filter with visual filter life indicator zone and sorbent-loaded visual reference zone | Andrew R. Fox, Himanshu Jasuja, Zhiqun Zhang | 2021-06-08 |