Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7780377 | Friction stabilizers and roof bolt head markings | Roland Walker, Matthew S. Slatter | 2010-08-24 |
| 6881015 | Wedge barrel for a mine roof cable bolt | Alexander I. Wallstein, Raymond Brandon, Roland Walker | 2005-04-19 |
| 5002057 | Cover for prism of an applanation tonometer and method of application thereof | — | 1991-03-26 |