Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4871117 | Low-contamination method for comminuting solid silicon fragments | Erich Bildl, Josef Dietl | 1989-10-03 |
| 4588571 | Process for the purification of silicon by the action of an acid | Erich Bildl, Josef Dietl, Dieter Seifert | 1986-05-13 |