Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6350314 | Process for producing nitrogen-doped semiconductor wafers | Wilfried von Ammon, Dirk Zemke, Christoph Frey | 2002-02-26 |
| 5746825 | Method for determining the diameter of a growing monocrystal | Wilfried von Ammon, Ludwig Thanner | 1998-05-05 |