Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5939019 | Steel for foundry roll shells | Gerald Stein, Lother Hentz, Heinz-Albert Weber, Hermann-Josef Skotz | 1999-08-17 |
| 4844747 | Process of producing a composite roll | Johannes Jachowski, Paul Pant, Gerald Stein | 1989-07-04 |