Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6446741 | Rock drill | Heinrich Kersten | 2002-09-10 |
| 6032750 | Drilling tool having a drill bit with primary and secondary cutting edges | Heinrich Kersten | 2000-03-07 |
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6446741 | Rock drill | Heinrich Kersten | 2002-09-10 |
| 6032750 | Drilling tool having a drill bit with primary and secondary cutting edges | Heinrich Kersten | 2000-03-07 |