Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4866731 | Electric furnace arrangement | Ernst Riegler, Hubert Hammerschmid | 1989-09-12 |
| 4841542 | Electric furnace arrangement | Ernst Riegler, Johann Muhlbauer | 1989-06-20 |
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4866731 | Electric furnace arrangement | Ernst Riegler, Hubert Hammerschmid | 1989-09-12 |
| 4841542 | Electric furnace arrangement | Ernst Riegler, Johann Muhlbauer | 1989-06-20 |