Issued Patents 1994
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5314268 | Non-metallic reinforcing rod and method of use in supporting a rock formation | John C. Stankus, John G. Oldsen | 1994-05-24 |
| 5302056 | Method and apparatus for supporting a mine roof | Jerry E. Frease, Lajos Kovacs, John C. Stankus, Eugene H. Stewart | 1994-04-12 |
| 5292209 | Bearing plate | John C. Stankus, Eugene H. Stewart | 1994-03-08 |