Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6148780 | Hydraulic element assembly | Daniel Patrick O'Neill, Albert C. Stone, William P. Vukovich | 2000-11-21 |
| 5775275 | Valve lifter | — | 1998-07-07 |
| 5520144 | Valve actuation assembly | Ralph Clayson | 1996-05-28 |
| 5273005 | Enlarged shaft roller lifter with retention means | Philip E. Lenhart, Mark Kaminski, Donald E. Wilcox | 1993-12-28 |
| 4724805 | Engine valve train module | Rick C. Wirth | 1988-02-16 |