Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5826517 | Bogie coupling system for convertible railway-railroad vehicle | Roger D. Sims | 1998-10-27 |
| 5539635 | Radio station program identifier and distribution system | — | 1996-07-23 |
| 5220870 | Convertible highway-railway hauling vehicle | — | 1993-06-22 |