Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4565525 | Taphole construction of a shaft furnace | Jacobus Van Laar, Jacob Felthuis, Jahannes A.M. Butter, Jacob Rengersen | 1986-01-21 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4565525 | Taphole construction of a shaft furnace | Jacobus Van Laar, Jacob Felthuis, Jahannes A.M. Butter, Jacob Rengersen | 1986-01-21 |