Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4696600 | Method and apparatus for modifying the cross-sectional profile of an adit, tunnel or the like | Georg Hurtz, Willi Steufmehl | 1987-09-29 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4696600 | Method and apparatus for modifying the cross-sectional profile of an adit, tunnel or the like | Georg Hurtz, Willi Steufmehl | 1987-09-29 |