Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8202185 | Random elastomer cushion rings for a chain sprocket | — | 2012-06-19 |
| 8057333 | Series spring blade tensioner | — | 2011-11-15 |
| 7691018 | Wedge-damped blade tensioner | Sam A. Kuznets | 2010-04-06 |
| 6945889 | Hydraulic chain tensioner | George L. Markley | 2005-09-20 |
| 5813935 | Chain guide with extruded wear face | Stanley K. Dembosky, Bradley F. Adams | 1998-09-29 |
| 5657725 | VCT system utilizing engine oil pressure for actuation | Roger P. Butterfield | 1997-08-19 |
| 5107805 | Camshaft with extra cam to increase the magnitude of torque pulsations therein | Roger P. Butterfield, Timothy J. Ledvina, Philip J. Mott | 1992-04-28 |