Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7392887 | Bladder actuator for a railroad retarder | Thomas J. Heyden, Richard C. Bohme | 2008-07-01 |
| 7306077 | Fail-safe, weight-responsive skate retarder | Thomas J. Heyden | 2007-12-11 |
| 6536693 | Rock crusher seal | Albert Van Mullem, Bernard R. McCready | 2003-03-25 |
| 6241394 | Lubricating groove pattern for a journal bearing | Harvey J. Kallenberger | 2001-06-05 |