Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4871214 | Cheeking device, particularly for the hanging roof in mines, underground working points, or heading and similar | — | 1989-10-03 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4871214 | Cheeking device, particularly for the hanging roof in mines, underground working points, or heading and similar | — | 1989-10-03 |