Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4760797 | Method and apparatus for automated tie detection and tamping | John L. Stubbs, Jeffrey Thompson | 1988-08-02 |
| 4673854 | Electronic cross-level detection system | Jeffrey Thompson | 1987-06-16 |