Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6242721 | Cooktop with a non-metallic hotplate | Andreas Borrmann, Kurt Schaupert, Harry Engelmann | 2001-06-05 |
| 5636027 | Apparatus for making contactless measurements of the thickness of an object made of transparent material | Stefan Spengler, Georg Sparschuh | 1997-06-03 |