Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4847768 | Automatic engine oil change indicator system | Ellen S. Schwartz, Donald John Smolenski, John D. Keersmaekers, Christine M. Traylor | 1989-07-11 |
| 4768480 | Engine with spark ignition operation through the oil pressure switch after fuel shutoff | Daniel P. Grenn | 1988-09-06 |