Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6347758 | Strain relief main shaft | Robert R. Piepho | 2002-02-19 |
| 6227712 | Internal oil flow path for gear box bearings | — | 2001-05-08 |
| 5346148 | Asymmetric pulverizer tire | Bryan Hand, Robert R. Piepho | 1994-09-13 |
| 5098026 | Easy access pop off relief valve | Donald R. Dougan, Gerald W. Peters | 1992-03-24 |