Issued Patents All Time
Showing 26–36 of 36 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5064312 | Delay stopper for a mine roof anchor and method of manufacture thereof | Jerry E. Frease | 1991-11-12 |
| 4969778 | Expansion assembly for mine roof bolts utilized in small diameter bore holes | Mike Cokus, John C. Stankus, Paul Yacisin | 1990-11-13 |
| 4934873 | Mine roof support utilizing roof anchors having eye-bolt heads | — | 1990-06-19 |
| 4904123 | Expansion assembly for mine roof bolts utilized in small diameter bore holes | Mike Cokus, John C. Stankus, Paul Yacisin | 1990-02-27 |
| 4861197 | Roof bolt system | — | 1989-08-29 |
| 4784531 | Bendable roof bolt without notch | — | 1988-11-15 |
| 4678374 | Roof bolt with expansion shell and threaded nut | — | 1987-07-07 |
| 4518292 | Method and apparatus for combining resin bonding and mechanical anchoring of a bolt in a rock formation | — | 1985-05-21 |
| 4516885 | Method and apparatus for combining resin bonding and mechanical anchoring of a bolt in a rock formation | — | 1985-05-14 |
| 4419805 | Method for combining resin bonding and mechanical anchoring of a bolt in a rock formation | — | 1983-12-13 |
| 4413930 | Method and apparatus for combining resin bonding and mechanical anchoring of a bolt in a rock formation | — | 1983-11-08 |