Top Inventors at General Downhole Tools All Time
| Rank | Name | Patents |
|---|---|---|
| 1 | David Devlin | 4 |
| 2 | Michael Harvey | 4 |
| 3 | Jovan Vracar | 2 |
| #4 | Dave Devlin | 1 |
| #5 | Jovan Vrcar | 1 |
| #6 | Mike Harvey | 1 |
| #7 | Vladimir Jorgic | 1 |
| Rank | Name | Patents |
|---|---|---|
| 1 | David Devlin | 4 |
| 2 | Michael Harvey | 4 |
| 3 | Jovan Vracar | 2 |
| #4 | Dave Devlin | 1 |
| #5 | Jovan Vrcar | 1 |
| #6 | Mike Harvey | 1 |
| #7 | Vladimir Jorgic | 1 |