Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5151849 | Headlamp leveling arrangement | William E. Nagengast | 1992-09-29 |
| 5095410 | Retainer arrangement for a replaceable lamp bulb assembly | William E. Nagengast, David R. McMahan, Harry L. Kirchenbauer | 1992-03-10 |
| 4959758 | Headlamp assembly | Robert G. Roeske, Bartley A. Haydu | 1990-09-25 |