Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8337946 | Coated noble metal elements for glass production | Franz Ott, Joerg Witte | 2012-12-25 |
| 7648732 | Coated metal elements for producing glass | Franz Ott, Joerg Witte | 2010-01-19 |
| 7338714 | Coated metal element used for producing glass | Franz Ott, Joerg Witte | 2008-03-04 |
| 7231788 | Method and device for refining a glass melt using negative pressure | Frank Karetta, Joerg Witte, Klaus-Dieter Duch, Wolfgang Muench, Allen Jakway +2 more | 2007-06-19 |