Issued Patents 2021
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11192059 | Uniformly expandable air filter | Andrew R. Fox, Bryan L. Gerhardt | 2021-12-07 |
| 10981099 | Expandable air filters | Laura C. Chesnut, Danielle M. Schreppel, Stephen M. Sanocki, Zhiqun Zhang, Craig D. Thompson +1 more | 2021-04-20 |
| 10940416 | Air filter devices with gap sealing unit | Thomas J. Herbrand, David J. Prince, Danielle M. Schreppel, Craig D. Thompson, Judd D. Olson | 2021-03-09 |
| 10921020 | Air filter comprising frame with bowed inner edge | Jonathan M. Lise, Kimberly W. Menzenski, David W. Ziemann | 2021-02-16 |