Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6761376 | Steering column for a vehicle | Richard K. Riefe, Marvin V. Manwaring, Ray Armstrong, Ravindra Jwalapathy | 2004-07-13 |
| 6659504 | Steering column for a vehicle | Richard K. Riefe, Marvin V. Manwaring, Ray Armstrong, Ravindra Jwalapathy | 2003-12-09 |