Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9505416 | Top chord stiffener for enclosed railcar | Richard W. Dawson, Ronald P. Sellberg | 2016-11-29 |
| 8833269 | Top chord stiffener for enclosed railcar | Richard W. Dawson, Ronald P. Sellberg | 2014-09-16 |
| 7802525 | Multi-fold doors for enclosed railcars | Richard W. Dawson, Ronald P. Sellberg | 2010-09-28 |