Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4769107 | Process and apparatus for the cyclical manufacture of silicon shaped articles | Dieter Helmreich, Cord Gessert, Helmut Zauhar, Georg Priewasser, Leonhard Schmidhammer | 1988-09-06 |
| 4366024 | Process for making solar cell base material | Gerhard Ast, Josef Dietl, Dieter Helmreich, Erhard Sirtl | 1982-12-28 |