Issued Patents All Time
Showing 1–7 of 7 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9353576 | Hammer bit | — | 2016-05-31 |
| 7387071 | Blasting method and blasting accessory | Nils Alberto Heinke, Stephen M. Collinsworth | 2008-06-17 |
| 7052092 | Drillhole blasting | Stephen M. Collinsworth, Nils Alberto Heinke | 2006-05-30 |
| 6481502 | Borehole closure plug | Nils Alberto Heinke, Stephen M. Collinsworth | 2002-11-19 |
| 5841060 | Blast plug | — | 1998-11-24 |
| 5647448 | Drill bit having a plurality of teeth | — | 1997-07-15 |
| 4953642 | Rock drill bit | — | 1990-09-04 |