Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4881239 | Fault detection during remelt of electrodes into blocks | Felix Muller, Gerhard Bruckmann, Alok Choudhury | 1989-11-14 |
| 4797897 | Apparatus for controlling the distance of a melting electrode from the surface of the melted material in a vacuum arc furnace | Friedrich-Werner Thomas | 1989-01-10 |