Issued Patents 2004
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6797230 | Gas stopper brick for metallurgical vessels with a sealing body that is subject to screw pressure springs | Juergen Kuhlmann, Eberhard Heimann, Klaus Ruwier | 2004-09-28 |