Issued Patents 2004
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6797229 | Apparatus for removing dust accretions from a smelting furnace | Eero Hugg | 2004-09-28 |
| 6755890 | Method for reducing non-ferrous metal content in slag in the production of non-ferrous metals occurring in suspension smelting furnace | Pekka Hanniala, Ilkka Kojo | 2004-06-29 |
| 6742699 | Method for manufacturing a cooling element and a cooling element | Yrjö Leppänen | 2004-06-01 |