Issued Patents 2011
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8002029 | Apparatus and method for raising a fluid in a well | Windel O. Mayfield | 2011-08-23 |
| 7971647 | Apparatus and method for raising a fluid in a well | Windel O. Mayfield | 2011-07-05 |