Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6171395 | Process and heating device for melting semiconductor material | Wilfried von Ammon, Erich Tomzig | 2001-01-09 |
| 6117230 | Process for producing a silicon single crystal, and heater for carrying out the process | Wilfried Ammon, Erich Tomzig, Yuri Gelfgat | 2000-09-12 |
| 4427644 | Process for the preparation of bivalent metal peroxides | Werner Doetsch, Helmut Dillenburg, Helmut Honig | 1984-01-24 |
| 4397833 | Process for the continuous production of alkali metal superoxides | Werner Doetsch | 1983-08-09 |