Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4848751 | Lance for discharging liquid nitrogen or liquid argon into a furnace throughout the production of molten metal | Noel F. Lutgen | 1989-07-18 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4848751 | Lance for discharging liquid nitrogen or liquid argon into a furnace throughout the production of molten metal | Noel F. Lutgen | 1989-07-18 |