Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6772772 | Method for cleaning an exhaust gas recirculation system | Daniel P. Degnan, Harold E. Erwin | 2004-08-10 |
| 6478036 | Method and apparatus for cleaning exhaust gas recirculation system | Daniel P. Degnan, Harold E. Erwin | 2002-11-12 |