Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4954422 | Recording material containing a layer of polymer particles and a superimposed metallic layer | Gregor Ley, Arend Werner, Helmut Barzynski | 1990-09-04 |
| 4937171 | Photosensitive recording material | Gregor Ley, Arend Werner, Helmut Barzynski | 1990-06-26 |
| 4666948 | Preparation of resilient melamine foams | Frank P. Woerner, Peter Neumann, Harald Mahnke, Dieter Horn, Gerhard Turznik +3 more | 1987-05-19 |
| 4285597 | Goniophotometer for measuring the gloss and/or light diffusion of surfaces | Gregor Ley | 1981-08-25 |
| 4255310 | Aqueous paints which contain polyglycidylamines as additives | Knut Oppenlaender, Rainer Strickler, Hans J. Geelhaar, Erich Penzel, Gregor Ley | 1981-03-10 |