Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6155792 | Wireline retrievable oilwell pumping system | Alan C. Hartley, Norman Obst | 2000-12-05 |
| 5449039 | Apparatus and method for horizontal well fracture stimulation | Alan C. Hartley | 1995-09-12 |