Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6814243 | Replaceable filter with locking mechanism | Aaron Kenneth Amstutz, David C. Becktel, Jeffrey R. Ries | 2004-11-09 |
| 6481580 | Fluid filter with locking mechanism | Aaron Kenneth Amstutz, David C. Becktel, Jeffrey R. Ries | 2002-11-19 |
| 6384369 | Liquid filter construction and methods | Eivind Stenersen, David B. Harder, John R. Hacker, Gerald D. Kiral, Ronald W. Streitmatter | 2002-05-07 |