Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6910834 | Mine prop | Charles C. Lash | 2005-06-28 |
| 4393018 | Method for making a concrete block | Raymond S. Smetana | 1983-07-12 |
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6910834 | Mine prop | Charles C. Lash | 2005-06-28 |
| 4393018 | Method for making a concrete block | Raymond S. Smetana | 1983-07-12 |