Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8691009 | Crystal pulling apparatus and method for the production of heavy crystals | Burkhard Altekruger, Axel Vonhoff, Erich Tomzig, Dieter Knerer | 2014-04-08 |
| 7828897 | Crystal pulling apparatus and method for the production of heavy crystals | Burkhard Altekruger, Axel Vonhoff, Erich Tomzig, Dieter Knerer | 2010-11-09 |
| 5975768 | Pedal bearing system for bicycle | Joachim Hoffman | 1999-11-02 |