Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5730855 | Hoist apparatus and method for positioning anode in smelting furnace | Roger D. Luebke | 1998-03-24 |
| 5549799 | Hoist apparatus for positioning anode in smelting furnace | Roger D. Luebke | 1996-08-27 |