Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6843958 | Copper cooling plate for metallurgical furnaces | Franz Reufer, Mary Maureen Brandt, Axel Kubbutat | 2005-01-18 |
| 6685878 | Throat closing device for shaft furnaces, especially blast furnaces having a material feeding hopper | Jörg Overländer, Heinz-Peter Marciniak | 2004-02-03 |