Issued Patents 2017
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9583652 | Method for the wet-chemical etching back of a solar cell emitter | Berthold Schum, Knut Vaas | 2017-02-28 |
| 9558952 | Alkaline pickling process | Berthold Schum, Heinrich Blanke | 2017-01-31 |