Issued Patents All Time
Showing 1–21 of 21 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10758329 | Hydrating mouth guard | — | 2020-09-01 |
| 6296429 | Mine roof tension nut having improved frangible qualities | — | 2001-10-02 |
| 5599140 | Mine roof support system including an expansion anchor with means assisting resin component mixing and method of installation thereof | — | 1997-02-04 |
| 5501551 | Mine roof expansion anchor, expansible shell element used therein and method of installation | — | 1996-03-26 |
| 5352066 | Mine roof/bolt anchor assembly and method of installation thereof | Charles W. Schaeffer | 1994-10-04 |
| 5344257 | Mine roof expansion anchor and bail element | Carl A. Clark | 1994-09-06 |
| 5316414 | Mine roof expansion anchor, tapered plug element used therein and method of installation | — | 1994-05-31 |
| 5282698 | Threaded fastener, method of fabrication thereof and method of supporting a mine roof using such a fastener | Carl A. Clark | 1994-02-01 |
| 5275512 | Mine roof expansion anchor and bail member therefor | — | 1994-01-04 |
| 5222835 | Resin-mixing article for mine roof anchor | — | 1993-06-29 |
| 5219248 | Mine roof expansion anchor with improved bore hole engagement means and method of installation thereof | — | 1993-06-15 |
| 5098227 | Tubular retainer for mine roof expansion anchor and method of use | — | 1992-03-24 |
| 5094577 | Mine roof expansion anchor | Carl A. Clark | 1992-03-10 |
| 5064311 | Mine roof support structure and method | Roger Giroux | 1991-11-12 |
| 5033910 | Mechanical expansion anchor shell | — | 1991-07-23 |
| 5011337 | Mine roof expansion anchor shell and leaf | Carl A. Clark | 1991-04-30 |
| 4913593 | Mine roof expansion anchor | Carl A. Clark | 1990-04-03 |
| 4764055 | Resin reinforced expansion anchor system | Carl A. Clark | 1988-08-16 |
| 4707900 | Cylinder liner sleeve puller | Rodney L. Twogood, Roger D. Rawle | 1987-11-24 |
| 4618291 | Nut member and mine roof support system incorporating same | — | 1986-10-21 |
| 4516886 | Combined resin-mechanical mine roof support anchor | — | 1985-05-14 |