Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4417809 | Pattern scanning device for copying machines | Joachim Notzel, Harthmuth Buczek, Gunther Kirchhof | 1983-11-29 |
| 4215933 | Projection system for copying machines | Paul Feneberg, Georg Konigl, Gunther Kirchhof | 1980-08-05 |