Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5352066 | Mine roof/bolt anchor assembly and method of installation thereof | Raymond L. Wright | 1994-10-04 |
| 4859118 | Mine roof support anchor and process for installing the same | — | 1989-08-22 |
| 4429560 | Apparatus for making a transition plate for a mine roof truss | — | 1984-02-07 |
| 4395161 | Transition plate for a mine roof truss | Edwin B. Wilson, C. Frederick Eben, Charles L. Meyer | 1983-07-26 |
| 4345492 | Method of making metal forming punches | Emerson D. Spengler | 1982-08-24 |