Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8807050 | Railcar constant contact side bearing assembly | Paul B. Aspengen, Erik Jensen, Michael D. VanMaldegiam, Adam J. Merges, Jeff Ballerini +2 more | 2014-08-19 |
| 8201504 | Railcar constant contact side bearing assembly | William P. O'Donnell, Erik Jensen, Paul B. Aspengren, Michael D. VanMaldegiam, Paul A. Perlongo +1 more | 2012-06-19 |