Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5382942 | Engine oil monitoring system having an in-vehicle display of the current status of the oil | James M. Raffa, Terry Thomas Cwik, Michael F. Aronow, Winston A. Little, Allen H. Meitzler +3 more | 1995-01-17 |
| 5060156 | Method and apparatus for determining engine oil change intervals according to actual engine use | Jeffery L. Vajgart, Parshuram G. Date, Roger S. Heitzeg, Noel A. Walker, David A. McNamara +1 more | 1991-10-22 |