Issued Patents 1982
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4366024 | Process for making solar cell base material | Gerhard Ast, Josef Dietl, Dieter Helmreich, Hans-Dieter Miller | 1982-12-28 |
| 4312700 | Method for making silicon rods | Dieter Helmreich, Theo Zollner | 1982-01-26 |
| 4312850 | Semicontinuous process for the manufacture of pure silicon | Josef Dietl, Claus Holm | 1982-01-26 |