Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6527345 | Method for excavating a tunnel rock face by drilling a pattern of lifter and line holes | Gregory Baiden | 2003-03-04 |
| 6431796 | Mine backfill | Douglas E. Goldsack, Allan G. Douglas, William A. Manfred | 2002-08-13 |