Issued Patents 2003
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6527345 | Method for excavating a tunnel rock face by drilling a pattern of lifter and line holes | Wayne N. Lidkea | 2003-03-04 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6527345 | Method for excavating a tunnel rock face by drilling a pattern of lifter and line holes | Wayne N. Lidkea | 2003-03-04 |