Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5351399 | Method for forming grooves in roll surfaces | Wolfram Rittweger, Erich Vomhoff | 1994-10-04 |
| 4920623 | Heatable glazing or calendering roll | Erich Vomhoff | 1990-05-01 |
| 4730374 | Heatable glazing or calendering roll | Erich Vomhoff | 1988-03-15 |