Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8882428 | Proppant transfer system | John Heaton, Herbert J. Horinek, Ed B. Hagan, Robert Douglas Hayworth | 2014-11-11 |
| 6719062 | CT drilling rig | Mark Farabee, E. Alan Coats | 2004-04-13 |
| 6554075 | CT drilling rig | Mark Farabee, E. Alan Coats | 2003-04-29 |