Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4932615 | Railroad track simulator for assessing track signal susceptibility to electric power line interference | Marvin J. Frazier | 1990-06-12 |
| 4297548 | Vital incidental movement monitoring arrangement | — | 1981-10-27 |
| 4235403 | Speed control apparatus and method for railroad car retarders | Harold C. Gillen | 1980-11-25 |