Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4189258 | Walking mine-roof support | Alfred Maykemper | 1980-02-19 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4189258 | Walking mine-roof support | Alfred Maykemper | 1980-02-19 |