Issued Patents 1994
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5340199 | Method and machine for excavating drifts, tunnels, stopes, caverns or the like | Wilfried Piefenbrink, Hermann Hamburger | 1994-08-23 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5340199 | Method and machine for excavating drifts, tunnels, stopes, caverns or the like | Wilfried Piefenbrink, Hermann Hamburger | 1994-08-23 |