Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7717650 | Roof truss shoe having wedge retention device and method of using the same | Tony Reschke, Roland Walker | 2010-05-18 |
| 7690868 | Cable coupler having retained wedges | Alexander I. Wallstein, Tony Reschke, Roland Walker | 2010-04-06 |
| 7384216 | Cable coupler having retained wedges | Alexander I. Wallstein | 2008-06-10 |
| 6881015 | Wedge barrel for a mine roof cable bolt | Alexander I. Wallstein, Roland Walker, Steven E. Brady | 2005-04-19 |