Issued Patents 2011
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7992657 | Earth bit having a wear ring | — | 2011-08-09 |
| 7980269 | Control valve assembly for load carrying vehicles | Lawrence J. Fry, Joseph W. Lehmann, Michael P. Haskin | 2011-07-19 |
| 7975782 | Earth bit having a pressure relief valve | — | 2011-07-12 |