Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6081626 | Method and system for background removal in electronically scanned images | Horst Schroeder | 2000-06-27 |
| D399764 | Test document for scanners | Werner Ruppert | 1998-10-20 |
| D363031 | Test document | Werner Ruppert | 1995-10-10 |