Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4782740 | Piston and shaft assembly for an end-of-car cushioning unit | Howard E. Tonn, Clebern W. Sigley | 1988-11-08 |
| 4719686 | Method for repairing a piston and shaft assembly | Howard E. Tonn, Clebern W. Sigley | 1988-01-19 |