Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6604689 | Railroad communication tie | — | 2003-08-12 |
| 5836512 | Unitary steel railroad tie | — | 1998-11-17 |
| 4235836 | Method for making thermal insulating, fire resistant material | Leonard L. Wassell, Gerald B. Cole, James F. Pollock | 1980-11-25 |