Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9009994 | Rope shovel with curved boom | William J. Hren | 2015-04-21 |
| 8756839 | Rope shovel with curved boom | William J. Hren | 2014-06-24 |
| 4469594 | High pressure hydraulic system and self-cleaning filter assembly therefor | — | 1984-09-04 |