Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4555471 | Image-recording materials and image-recording carried out using these | Helmut Barzynski | 1985-11-26 |
| 4515877 | Image-recording materials and image-recording carried out using these to produce an optical mask | Helmut Barzynski | 1985-05-07 |
| 4447520 | Acylphosphine oxides and their use | Andreas Henne, Anton Hesse, Manfred Jacobi, Gunnar Schornick, Rudolf Vyvial | 1984-05-08 |