Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5078285 | Dragline modular swing drive unit | Allan E. Geyer, Richard W. McCoy, James A. Ehret | 1992-01-07 |
| 5058753 | Dragline rotating frame structure | James A. Ehret, Richard E. Blair, Shrishailesh R. Iyengar, Allan E. Geyer | 1991-10-22 |
| 4592667 | Method and apparatus for minimizing effect of hard spots in rotating frame structure of mining machine on roller bearings | — | 1986-06-03 |