Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6696679 | Method for focusing of disk-shaped objects with patterned surfaces during imaging | Michael A. Graef, Uwe Graf, Joachim Wienecke, Guenter Hoffmann, Lutz Jakob | 2004-02-24 |
| 6075880 | Method for detection of defects in the inspection of structured surfaces | Dietmar Kollhof, Joachim Wienecke, Michael A. Graef, Heiko-Ulrich Klaus Kempe | 2000-06-13 |
| 4612173 | Method of purifying by-product gypsum | Hans-Werner Gosch, Jorg Kohlbecker, Bahram Dormichian | 1986-09-16 |