Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4867787 | Mill arrangement with temporary storage vessel and a process of operating the same | Othmar Puhringer, Felix Wallner, Horst Wiesinger, Wilhelm Schiffer, Walter Rockenschaub | 1989-09-19 |
| 4804408 | A mill arrangement and a process of operating the same using off gases to refine pig iron | Othmar Puhringer, Felix Wallner, Horst Wiesinger, Wilhelm Schiffer, Walter Rockenschaub | 1989-02-14 |