Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4619441 | Shaft furnace having a metal shell, a refractory lining and cooling bodies projecting through the shell into the lining | Jacob Felthuis, Jacobus Van Laar | 1986-10-28 |
| 4565525 | Taphole construction of a shaft furnace | Jacobus Van Laar, Jacob Felthuis, Jahannes A.M. Butter, Albert Sannes | 1986-01-21 |