Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6585887 | End cap relief valve mechanism for a filter | Larry Dean Michels, Richard Schwarzlose | 2003-07-01 |
| 6544412 | Filter including temperature and pressure responsive bypass | Larry Dean Michels | 2003-04-08 |
| 4547287 | Thermostatically controlled pack hold-down assembly | — | 1985-10-15 |