Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7025827 | Doped semiconductor wafer of float zone pulled semiconductor material, and process for producing the semiconductor wafer | Rolf Knobel, Wilfried von Ammon, Janis Virbulis | 2006-04-11 |
| 6840998 | Silicon single crystal produced by crucible-free float zone pulling | Ludwig Altmannshofer, Janis Virbulis | 2005-01-11 |
| 5352637 | Process for producing storage-stable silicon wafer surfaces having advantageous oxidation properties and silicon wafer fored thereby | Laszlo Fabry, Dieter Graef, Susanne Bauer-Mayer, Peter John | 1994-10-04 |
| 5219613 | Process for producing storage-stable surfaces of polished silicon wafers | Laszlo Fabry, Peter John, Wolfgang Feichtner, Dieter Graefg, Rosemarie Winklharrer | 1993-06-15 |