Issued Patents 2021
Showing 1–3 of 3 patents
| 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, Himanshu Jasuja | 2021-06-08 |
| 10994235 | Refillable air filter assembly | Andrew R. Fox, Nicolas A. Echeverri, Gary N. Eastlund | 2021-05-04 |
| 10981099 | Expandable air filters | Glen O. Gregerson, Laura C. Chesnut, Danielle M. Schreppel, Stephen M. Sanocki, Craig D. Thompson +1 more | 2021-04-20 |