Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6637703 | Yard tracking system | William L. Matheson | 2003-10-28 |
| 6135396 | System and method for automatic train operation | William L. Matheson, Fred A. Ford, Wayne Basta, Ernest Peek, Anthony J. Guarino +2 more | 2000-10-24 |