Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5106245 | Wheel chocks for use on vehicle transport carriers | William E. Fritz | 1992-04-21 |
| 5005739 | Railroad hopper car outlet gate end tube seal | William E. Fritz | 1991-04-09 |
| 4974999 | Lock for a railroad hopper car outlet gate end tube assembly | William E. Fritz | 1990-12-04 |
| 4975000 | Railroad hopper car outlet gate end tube assemblies | William E. Fritz | 1990-12-04 |