Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6334396 | Switch stoneblower | Kevin A. Hansen | 2002-01-01 |
| 5617639 | Railroad maintenance vehicle reference system transducer | — | 1997-04-08 |
| 5605099 | Maintenance vehicle and method for measuring and maintaining the level of a railroad track | Dennis A. Sroka, Bruce W. Bradshaw, David Mathew Johnson | 1997-02-25 |
| 5577446 | Stoneblower having adjustable workheads and improved blowing tubes | Mark S. Krusniak | 1996-11-26 |
| 5012413 | Railroad track curve lining apparatus and method | Dennis A. Sroka | 1991-04-30 |
| 4436191 | Automobile hand control | — | 1984-03-13 |