Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4821544 | Method and apparatus for roll gap measurement and control | Horst Walter Tamler, Wilhelm Tappe | 1989-04-18 |
| 4818106 | Spectral analysis device on a converter | Karl-Heinz Koch, Fritz Meininghaus, Wilhelm Tappe | 1989-04-04 |