Issued Patents All Time
Showing 26–34 of 34 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7559378 | Portable and directional electrocrushing drill | — | 2009-07-14 |
| 7530406 | Method of drilling using pulsed electric drilling | Gilman A. Hill | 2009-05-12 |
| 7527108 | Portable electrocrushing drill | — | 2009-05-05 |
| 7416032 | Pulsed electric rock drilling apparatus | Gilman A. Hill | 2008-08-26 |
| 7384009 | Virtual electrode mineral particle disintegrator | — | 2008-06-10 |
| 6761416 | Method and apparatus for a plasma-hydraulic continuous excavation system | — | 2004-07-13 |
| 6215734 | Electrohydraulic pressure wave projectors | Niels K. Winsor | 2001-04-10 |
| 5896938 | Portable electrohydraulic mining drill | David M. Barrett | 1999-04-27 |
| 4741405 | Focused shock spark discharge drill using multiple electrodes | James G. Small | 1988-05-03 |