Issued Patents 1997
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5676471 | Dragline with improved thrust bearing assembly supporting upper structure | Joseph L. Huffman | 1997-10-14 |
| 5642577 | Dragline with high headroom between upper and lower structures | — | 1997-07-01 |
| 5603174 | Dragline including improved walking mechanism | Joseph L. Huffman | 1997-02-18 |
| 5600905 | Dragline with improved pinion shaft mounting | John P. Mahoney | 1997-02-11 |