Issued Patents All Time
Showing 1–8 of 8 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4901681 | Motion isolated engine manifold | Carl L. Friebel | 1990-02-20 |
| 4831976 | Engine with valve seat inserts and method of retaining | Leonardas Kutkus | 1989-05-23 |
| 4672843 | Peak combustion pressure timing detector for IC engine using intake valve deformation | — | 1987-06-16 |
| 4548185 | Engine control method and apparatus | — | 1985-10-22 |
| 4502848 | Exhaust gas operated vacuum pump assembly | Gerald F. Robertson | 1985-03-05 |
| 4502847 | Exhaust gas operated vacuum pump assembly | Gerald F. Robertson, Michael J. McClain | 1985-03-05 |
| 4479765 | Exhaust gas operated vacuum pump assembly | Gerald F. Robertson, Michael J. McClain | 1984-10-30 |
| 4223648 | Hydraulic valve lifter | Ronald J. Herrin | 1980-09-23 |