Issued Patents All Time
Showing 1–9 of 9 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8691009 | Crystal pulling apparatus and method for the production of heavy crystals | Burkhard Altekruger, Stefan Henkel, Axel Vonhoff, Dieter Knerer | 2014-04-08 |
| 7828897 | Crystal pulling apparatus and method for the production of heavy crystals | Burkhard Altekruger, Stefan Henkel, Axel Vonhoff, Dieter Knerer | 2010-11-09 |
| 7771530 | Process and apparatus for producing a silicon single crystal | Janis Virbulis, Wilfried von Ammon, Yuri Gelfgat, Lenoid Gorbunov | 2010-08-10 |
| 6238477 | Process and device for the production of a single crystal | Wilfried von Ammon, Janis Virbulis | 2001-05-29 |
| 6171395 | Process and heating device for melting semiconductor material | Wilfried von Ammon, Paul Fuchs | 2001-01-09 |
| 6132507 | Process and device for the production of a single crystal | Wilfried von Ammon, Janis Virbulis | 2000-10-17 |
| 6117230 | Process for producing a silicon single crystal, and heater for carrying out the process | Wilfried Ammon, Paul Fuchs, Yuri Gelfgat | 2000-09-12 |
| 6001170 | Process and apparatus for the growth of single crystals | Werner Zulehner, Wilfried von Ammon, Yu M Gelfgat, Leonid Gorbunov | 1999-12-14 |
| 5462011 | Method for pulling single crystals | Reinhard Wolf, Wolfgang Hensel | 1995-10-31 |