Issued Patents 2021
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11187064 | Well pumping system with enclosed rod rotator | Patricia L. Vines, Clark E. Robison | 2021-11-30 |
| 11174856 | Apparatus and methods for counterbalancing a pumping unit | Clark E. Robison, Jeffrey J. Lembcke, Ross E. MOFFETT, Bryan A. Paulet, Phillip Andrew Briggs +2 more | 2021-11-16 |
| 11098708 | Hydraulic pumping system with piston displacement sensing and control | Kenneth J. Schmitt, Clark E. Robison, Robert G. McDonald, James S. Trapani | 2021-08-24 |
| 10962000 | Long stroke pumping unit | Clark E. Robison, Sean M. Christian | 2021-03-30 |
| 10890175 | Direct drive pumping unit | Jeffrey J. Lembcke, William Kevin Hall, Clark E. Robison, Sean M. Christian | 2021-01-12 |