Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4953915 | Roof fall separating and removing apparatus and method for use in thin seam highwall mining | Thomas Lipinski | 1990-09-04 |
| 4952000 | Method and apparatus for increasing the efficiency of highwall mining | Thomas Lipinski, Eugene Dunaway | 1990-08-28 |