Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7428947 | Electrically controlled in-muffler exhaust valve for use during cylinder deactivation | John Nohl, Joseph Callahan | 2008-09-30 |
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7428947 | Electrically controlled in-muffler exhaust valve for use during cylinder deactivation | John Nohl, Joseph Callahan | 2008-09-30 |