Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4304107 | Series spring torsional vibration damper | Paul E. Lamarche | 1981-12-08 |
| 4302951 | Torsional vibration damper | Paul E. Lamarche | 1981-12-01 |
| 4188805 | Torsional vibration damper | Paul E. Lamarche | 1980-02-19 |
| 4188806 | Torsional vibration damper assembly | Paul E. Lamarche | 1980-02-19 |