Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6793818 | Support and locking structure for a fuel filter | David C. Entringer | 2004-09-21 |
| 6553974 | Engine fuel system with a fuel vapor separator and a fuel vapor vent canister | Timothy P. Wickman, David C. Entringer, Brian L. Merten, DuWayne C. Schelter | 2003-04-29 |