Issued Patents 1994
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 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 |