Issued Patents All Time
Showing 1–10 of 10 patents
| Patent # | Title | Co-Inventors | Date | Approx Value ⓘ |
|---|---|---|---|---|
| 5344257 | Mine roof expansion anchor and bail element | Raymond L. Wright | 1994-09-06 | $263,000 |
| 5282698 | Threaded fastener, method of fabrication thereof and method of supporting a mine roof using such a fastener | Raymond L. Wright | 1994-02-01 | $230,000 |
| 5094577 | Mine roof expansion anchor | Raymond L. Wright | 1992-03-10 | $299,000 |
| 5011337 | Mine roof expansion anchor shell and leaf | Raymond L. Wright | 1991-04-30 | $180,000 |
| 4913593 | Mine roof expansion anchor | Raymond L. Wright | 1990-04-03 | $100,000 |
| 4764055 | Resin reinforced expansion anchor system | Raymond L. Wright | 1988-08-16 | |
| 4662795 | Method of supporting a mine roof using nut element with breakable portion | John Rogala | 1987-05-05 | |
| RE31776 | Resin reinforced expansion anchor and method of installation | John Rogala | 1984-12-25 | |
| 4403894 | Rock bolt expansion anchor having windened expansion range | — | 1983-09-13 | $92,000 |
| 4269205 | Thumb hair gauge | Kathleen J. Clark | 1981-05-26 |