Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8926406 | Surface applied abrasive cleaning apparatus and method | Dusan Mrak, Eric C. Hauge, Rick M. Tarver | 2015-01-06 |
| 6283833 | Method and apparatus for producing a high-velocity particle stream | Y. H. Michael Pao, Ross T. Coogan | 2001-09-04 |
| 6168503 | Method and apparatus for producing a high-velocity particle stream | Y. H. Michael Pao, Ross T. Coogan | 2001-01-02 |
| 4665944 | On-off dump valve | Gerald F. Wallace | 1987-05-19 |
| 4437525 | Hand held water drilling apparatus | Tom O'Hanlon, Gearld F. Wallace | 1984-03-20 |
| 4275793 | Automatic control system for rock drills | George P. Schivley, Jr. | 1981-06-30 |