Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4994216 | Process of making carbon-bonded refractory shaped articles | Ullrich Hintzen, Ernst Luhrsen | 1991-02-19 |
| 4640447 | Molten metal immersion pouring spout | Heinrich Geller, Peter Nold, Ortwin Rave | 1987-02-03 |
| 4290589 | Teeming pipe for use at the outlet of a melt container | Ernst Luhrsen | 1981-09-22 |