Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5431133 | Low mass two-step valve lifter | Mark J. Spath, Christopher M. De Minco | 1995-07-11 |
| 5398648 | Compact valve lifters | Mark J. Spath, Timothy J. Peterson, Ivan Rafael Samalot, Christopher DeMinco, Timothy W. Kunz | 1995-03-21 |
| 5361733 | Compact valve lifters | Mark J. Spath, Timothy J. Peterson, Ivan Rafael Samalot, Christopher M. De Minco, Timothy W. Kunz | 1994-11-08 |