Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6032886 | Adjustment for rock crusher | Roger M. Clark, Gerald E. Parker, David F. Peaks, Gary Heeszel, Randy Orre | 2000-03-07 |
| 5950939 | Cone crusher for rock | Roger M. Clark, Gerald E. Parker, David F. Peaks | 1999-09-14 |