Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6001170 | Process and apparatus for the growth of single crystals | Erich Tomzig, Wilfried von Ammon, Yu M Gelfgat, Leonid Gorbunov | 1999-12-14 |
| 4954189 | Silicon wafers for producing oxide layers of high breakdown strength and process for the production thereof | Peter Hahn, Hubert Piontek, Anton Schnegg | 1990-09-04 |
| 4572729 | Method for producing articles of high-purity synthetic quartz glass | Winfried Lang, Rudolf Griesshammer, Michael Schwab | 1986-02-25 |
| 4330362 | Device and process for pulling high-purity semiconductor rods from a melt | — | 1982-05-18 |