Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10918985 | Filter element and seal therefor | Nathan E. Marks, Thomas J. Hamlin | 2021-02-16 |
| 8636151 | Method of preventing filter media cracking when compressing two or more filter media layers | Neal M. Duval | 2014-01-28 |
| 7645312 | Pleated multi-layer filter media and cartridge | Thomas J. Hamlin, Peter J. Leavesley, Richard Sale | 2010-01-12 |