Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8053381 | Optically detectable, floatable arsenic- and antimony-free, glazable lithium-aluminosilicate glass | Friedrich Siebers, Hans-Werner Beudt, Gerbard Lautenschläger, Klaus Schneider, Michael Jacquorie +1 more | 2011-11-08 |
| 6515263 | COOKING STOVE HAVING A SMOOTH-TOP GLASS CERAMIC COOKTOP, AND A SMOOTH-TOP GLASS CERAMIC COOKTOP WITH A GLASS CERAMIC COOKTOP COOKING SURFACE, METHOD FOR PRODUCTION OF STOVES WITH SMOOTH-TOP GLASS CERAMIC COOKTOPS AND SMOOTH-TOP GLASS CERAMIC COOKTOPS | Ina Mitra, Friedrich Siebers, Otmar Becker, Andreas Schminke, Christian Roos +4 more | 2003-02-04 |