Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| RE44177 | Railroad car energy absorption apparatus | William P. O'Donnell, Michael D. VanMaldegiam, Erik Jensen, Donald E. Wilt | 2013-04-30 |
| D529828 | Measuring tool | Paul B. Aspengren, William P. O'Donnell, Joseph M. Ingraham, Raymond E. DeGraw | 2006-10-10 |
| 7044061 | Railroad car energy absorption apparatus | William P. O'Donnell, Michael D. VanMaldegiam, Erik Jensen, Donald E. Wilt | 2006-05-16 |
| 6862999 | Railroad car energy absorption apparatus | William P. O'Donnell, Michael D. VanMaldegiam, Erik Jensen, Donald E. Wilt | 2005-03-08 |
| 6792871 | Railroad car energy absorption apparatus | William P. O'Donnell, Michael D. VanMaldegiam, Erik Jensen, Donald E. Wilt | 2004-09-21 |
| D392566 | Beverage can | Bruce Vahjen | 1998-03-24 |
| 5029738 | Dispensing tube and flexible spout construction | — | 1991-07-09 |