Issued Patents 1994
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5302056 | Method and apparatus for supporting a mine roof | Frank Calandra, Jr., Jerry E. Frease, John C. Stankus, Eugene H. Stewart | 1994-04-12 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5302056 | Method and apparatus for supporting a mine roof | Frank Calandra, Jr., Jerry E. Frease, John C. Stankus, Eugene H. Stewart | 1994-04-12 |