Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10851436 | Method for joining steel rails with controlled weld heat input | Gregory Ryan Lehnhoff, Mark David Richards | 2020-12-01 |
| 9670570 | High carbon steel rail with enhanced ductility | Gregory Ryan Lehnhoff, Mark David Richards | 2017-06-06 |
| 9334546 | Method and apparatus for treatment of a rail weld | Kenneth H. Reid | 2016-05-10 |