Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6490517 | Filter method for engine speed to vehicle speed ratios | Yi Cheng | 2002-12-03 |
| 5353753 | Two-stroke engine lubrication | Kenneth J. Buslepp | 1994-10-11 |
| 5274335 | Oil sensor systems and methods of qualitatively determining oil type and condition | Su-Chee Simon Wang, Han-Sheng Lee, David R. Staley | 1993-12-28 |