Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D258718 | Mine roof support plate | Alvaro L. Collin | 1981-03-31 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D258718 | Mine roof support plate | Alvaro L. Collin | 1981-03-31 |