Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4869470 | Vacuum furnace for heat treatment of metallic workpieces | Paul Heilmann, Friedrich Preisser, Rolf Schuster | 1989-09-26 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4869470 | Vacuum furnace for heat treatment of metallic workpieces | Paul Heilmann, Friedrich Preisser, Rolf Schuster | 1989-09-26 |