Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7231788 | Method and device for refining a glass melt using negative pressure | Joerg Witte, Klaus-Dieter Duch, Dirk Gohlke, Wolfgang Muench, Allen Jakway +2 more | 2007-06-19 |
| 7040122 | Process for production of molten glass | Stefan Schmitt, Rule Kirchhoff, Wilfried Linz, Norbert Osterhage, Gerhard Lautenschlager +4 more | 2006-05-09 |
| 6735237 | Device for producing a glass melt | Klaus-Dieter Duch, Franz Ott, Siegfried Breitfelder | 2004-05-11 |