Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4769107 | Process and apparatus for the cyclical manufacture of silicon shaped articles | Dieter Helmreich, Hans-Dieter Miller, Helmut Zauhar, Georg Priewasser, Leonhard Schmidhammer | 1988-09-06 |
| 4461671 | Process for the manufacture of semiconductor wafers | Dieter Seifert, Erhard Sirtl | 1984-07-24 |
| 4428783 | Process for the manufacture of vertical P-N junctions in the pulling of silicon from a silicon melt | — | 1984-01-31 |