Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11160370 | High-strength colored glass ceramics as a cooktop, smooth on both sides | Birgit Doerk, Evelin Weiss, Thomas Zenker, Ulf Hoffmann, Silke Knoche +4 more | 2021-11-02 |
| 10028580 | High-strength colored glass ceramics as a cooktop, smooth on both sides | Birgit Doerk, Evelin Weiss, Thomas Zenker, Ulf Hoffmann, Silke Knoche +4 more | 2018-07-24 |
| 7361405 | Transparent colorless glass or glass-ceramic panel having an optically dense colored coating and method of making same | Gabriele Roemer-Scheuermann, Andrea Anton, Harald Striegler, Gerhard Weber, Lutz Klippe +2 more | 2008-04-22 |
| 7000429 | Roller table for carrying and transporting a hot glass band | Andreas Langsdorf, Hans-Joachim Witte | 2006-02-21 |
| 4887660 | Roll-up door | — | 1989-12-19 |