Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4264237 | Method for controlling a hydraulically operated mine roof support and an arrangement for carrying out the method | Friedrich Graawe | 1981-04-28 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4264237 | Method for controlling a hydraulically operated mine roof support and an arrangement for carrying out the method | Friedrich Graawe | 1981-04-28 |