Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8944201 | Enclosed cab system for mining equipment | James Krellner, David P. Paich | 2015-02-03 |
| 4817908 | Seat suspension for underground mining machines | Ronald D. Hanlon | 1989-04-04 |
| 4569489 | Cable tension control device | George R. Frey, Daryl A. Bleakley, John Willison | 1986-02-11 |