Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8499900 | Electro-hydraulic railcar retarders for controlling the speed of a railcar | Thomas J. Heyden, Kurt J. Penney | 2013-08-06 |
| 8485105 | Devices and systems for stopping travel of a railcar | Thomas J. Heyden | 2013-07-16 |
| 8485107 | Devices and systems for controlling travel of a railcar | Thomas J. Heyden, John A. Hooper, Lowell B. Ziese, Jim Thomas | 2013-07-16 |
| 8413770 | Systems and methods for retarding the speed of a railcar | Thomas J. Heyden, Kurt J. Penney | 2013-04-09 |
| 8079309 | Devices and systems for controlling travel of a railcar | Thomas J. Heyden, John A. Hooper, Lowell B. Ziese, Jim Thomas | 2011-12-20 |