Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4953727 | Piston and shaft assembly of railroad end-of-car cushioning devices and method of repairing same | Howard E. Tonn, Robert Davidson, Keith Miller | 1990-09-04 |
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4953727 | Piston and shaft assembly of railroad end-of-car cushioning devices and method of repairing same | Howard E. Tonn, Robert Davidson, Keith Miller | 1990-09-04 |