Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7719675 | Method for optical characterization and evaluation of optically variable devices and media | Kelan Wieloch | 2010-05-18 |
| 7605911 | System and method for visual quality characterization of holographic materials | Kelan Wieloch | 2009-10-20 |
| 6281993 | Phase shifting element for optical information processing storing systems | Maria-Pilar Bernal, Hans J. Coufal, Carl M. Jefferson, Egbert Oesterschoze, Kenneth Francis Walsh | 2001-08-28 |
| 5883875 | Short coherent-length optical tomograph for high density volume optical data storage devices | Hans Juergen Coufal | 1999-03-16 |
| 5827622 | Reflective lithographic mask | Hans Juergen Coufal | 1998-10-27 |
| 5717218 | Focal plane phase-shifting lithography | Hans Juergen Coufal | 1998-02-10 |
| 5650632 | Focal plane phase-shifting lithography | Hans Juergen Coufal | 1997-07-22 |
| 5571106 | Surgical cutting instrument | Hans Juergen Coufal | 1996-11-05 |
| 5280406 | Jet deposition of electrical charge on a dielectric surface | Hans Juergen Coufal | 1994-01-18 |